Proof load test for nuts. 2 Nuts machined from hot-forged or hot-rolled bar.
Proof load test for nuts 5 M30 561 698. 0: 16. 3 104. Essai de charge d'épreuve au cône des écrous. Apr 30, 1995 · This Standard specifies the properties of nuts with -- nominal thread diameter, d from 5 mm up to and including 39 mm, -- product grades A and B, -- property classes 8 to 12, under the conditions of the cone proof load test. 00 + VAT. The load that is used to stress the fastener is specific to the size, and grade/property class. Fastener holder sets are available in capacities ranging from 100 kN to 1500 kN. 2 Hardness test. Testing for product hardness is not required on stainless steel DIN 934 nuts. 1 Proof load test 10 8. JIS B 1085. Feb 25, 2025 · Proof Load. 4 Nuts machined from cold-drawn and annealed (min 1000 °F [538 °C]) bar. As long as a bolt is never tensioned beyond its specified proof load, you can be assured that it has maintained its original size and shape, and may be safely reused. 03 520 800 1040 1140 - 520 - M4 0. 6. ASTM A962. The maximum load will be based entirely on the equipment available. 4 Proof Load Testing—See Supplementary Requirement S9 for proof load testing of nuts manufactured to Hex Nuts HEX NUTS - STRESS UNDER PROOF LOAD (MPa or N/mm²) Nominal Pitch Stress Area Class 5 Class 8 Class 10 Class 12** AS1252 Mild Steel Sampson*** Size mm mm² Hex Coupler M3 0. PROOF LOAD TEST IS MEANT TO VERIFY THE BEARING LOAD CAPABILITY OF A GIVEN STRUHEAT TREATMENT PROCESS INTRODUCTION: 177kg SQUARE PROFILE PART FOR HEAT TREATME DH Heavy Hex Nuts ASTM A563 Grade C Heavy Hex Nuts Plain, Plated, & HDG Plain and Plated Hot-Dip Galvanized ASTM A563 Grade DH Heavy Hex Nuts Plain and Plated ASTM A194 Grade 2H Heavy Hex Nuts NC Threads NF Threads Proof Load: Axially-applied load using a bolt or mandrel that must be supported by a nut without evidence of thread stripping or Standards for Proof Load Testing on Bolts & Nuts: ISO 898 Parts 1 & 2. Oct 11, 2022 · How Do You Determine the Proof Load of Fasteners? In order to determine proof load, fasteners undergo a proof load testing procedure. 1 Proof Load Test 4. ) and all other test parameters meet A-370/F-606, is this method acceptable for complying with & certifying items as meeting the A-194/A-563 Material Specs? Hex Nuts Stress Under Proof Load (MPa or N/mm2) Learn about the different proof load properties of hex nuts of varying sizes. Apr 25, 2019 · Hii am Gursewak Joshi, welcome to my you tube channel GJ informative for learning proof load test of nut on Universal testing machine and others informative NUSATEK provides proof load testing up to 100kN applied load. 9 yield stress and is known as the ultimate safe load where the bolt and nut connection would return to its initial length and would remain in elastic area. 85 or 0. , A-194, A-563 etc. Acceptable clamp load is typically 75% of proof load. ISO 4033 7, Hexagon high nuts (style 2) — Product grades A and B [12] ISO 16048, The proof load test consists of applying the relevant proof load given in Table 10 which was obtained from the proof load stress given in Table 9. A material must remain in its elastic region when loaded up to its proof load typically between 85-95% of the yield strength. Proof Load Tests of Large Nuts. The fastener holder sets are capable of axial and wedge proof loading, tensile testing, and nut proof load testing in accordance with ASTM F606. 0 in. Applicability. Test Methods – Material and Property Requirements Nuts this large would require in excess of 160,000 pounds-force to test the proof load. Specifies under the conditions of the load test the properties of nuts with: nominal thread diameter from 5 mm up to 39 mm; product grades A and B; property classes 8 to 12. 2 to the loads required in Table S4. 1 and Table S4. Test for determining the surface and core hardnesses are, conversely, described for direct tension indicators, and through-hardened, carburized, stainless steel, and S4. 6 shall apply where the individual product specifications permit the use of machined specimens (see Test Methods E8/E8M). 5 Proof Load Test (No: GZIN1911064031ML-01) Cone proof load test on nuts (ISO 10485:1991) Specifies under the conditions of the load test the properties of nuts with: nominal thread diameter from 5 mm up to 39 mm; product grades A and B; property classes 8 to 12. For more information on proof testing, call us or send us an enquiry today. Our testing team will find the optimal testing solution for your sample. 7 Single Sheer Test 3. 3 Prevailing torque test. 10. 78 520 800 1040 1140 - 520 - M5 0. Nuts M16 and smaller are chamfered on the top and the bearing surface. In this chapter, the particularities of proof load testing are discussed. 4. The proof load test consists of two main operations, as follows, ⎯ application of a specified tensile proof load and ⎯ measurement of permanent elongation, if any, caused by the proof load. Manufacturers test bolts by pulling them with heavy loads—that's the proof load test. 5 in table. The proof load test consists of two main operations, namely. Proof Load: The Grade 12 Nuts with specified proof load values - coarse thread. Proof load test is meant to verify the load b HOW TO SET FOR PROOF LOAD TEST ON A M22 NUTTHIS VIDEO INTENDS TO SHOW HOW PROOF LOAD TEST IS PERFORMED IN LABS. Table 4 - Limits of chemical composition fl 4 1); 5 1); 6 1) 1 -- j 0,50 ) -- ) 0,060 ) 0,150 1) Nuts of these property classes may be manufactured HOW TO SET FOR PROOF LOAD TEST ON A M22 NUTTHIS VIDEO INTENDS TO SHOW HOW PROOF LOAD TEST IS PERFORMED IN LABS. ISO 898-1 Threaded fasteners Proof load test machine (DIN EN ISO 898-1, ASTM F606-1, DIN EN ISO 3506-1) 1. Construction bolts, like A325s, must pass these tests before they can be used in buildings. 3. Application of a specified proof load by means of a test mandrel (see Figures 1 and 2), and checking of the damage to the nut thread caused by the proof load, if any. NOTE For the proof load test for prevailing torque type nuts, see ISO 2320 for an additional test The proof load test (section 9. [25 mm] per minute maximum and shall be held for at least 10 s. In the testing of fasteners by manufactories or third party testing laboratories, the following standards are commonly used/recognized. There are tables for proof load stresses and minimum proof loads for different metric hex nuts, from M3 to M64 and for different classes of steel (Classes 5-12). A proof load test consists of stressing the product with a specified load that the product must withstand without measurable permanent set (Method 1 – Length Measurement). Assemble the nut to be tested on a hardened and tempered mandrel as shown in Figure C. To test proof load force, a tensile machine is used. 5 apply when testing externally threaded fasteners full size. 1, Hardness testing to ISO 6508-1; A194 Grade 7 Nuts Tensile testing to ISO 898-1; Tri-Roll Thread Comparators; SA 194 gr 7 Nuts Charpy Impact testing in accordance with ISO 148-1; Suitability test for calibrated preload When coated nuts are ordered, the purchaser should take special care to ensure that Appendix X2 is thoroughly under-stood. The document discusses testing procedures for bolts and nuts. 2, and B 18. 1 and apply the specified load in an axial direction. 5 M27 459 571. For all other nuts, minimum hardness is not mandatory but is provided for guidance only. ” Each manufactured Apr 10, 2021 · What Is Proof Load? Proof load is an amount of force that a fastener must be able to withstand without permanently deforming. Aug 4, 2024 · PROOF LOAD TEST IS MEANT TO VERIFY THE BEARING LOAD CAPABILITY OF A GIVEN STRUHEAT TREATMENT PROCESS INTRODUCTION: 177kg SQUARE PROFILE PART FOR HEAT TREATME Jun 12, 2023 · Cone proof load test on nuts (ISO 10485:1991) Essai de charge d'épreuve au cône des écrous (ISO 10485:1991) Kegelprüfkraftversuch an Muttern (ISO 10485:1991) This European Standard was approved by CEN on 1 July 2004. Proof load tests are performed on components to ensure that these components can withstand the design load without failure or yielding (unacceptable deformation). 2248 lb. Proof load testing is performed on finished nuts using the specified load out lined within the relevant standard. As per DIN 267-10 for typical grades and sizes Aug 4, 2021 · Proof load test for finished bolts, screws and studs General. 10 580 870 1040 1140 - 580 - Cone proof load test on nuts - ISO 10485:1991 NUT PROOF LOAD TEST. 4) Value for stress under proof load S p, nom and their relation to stress at non-proportional elongation see mechanical and physical properties of screws, No. 3 6. ). 2 Grade 1 and 2 nuts made by hot forging or by Dec 19, 1993 · Mechanical properties of fasteners - Part 2: Nuts with specified proof load values - Coarse thread (ISO 898-2:1992) Applies to nuts with nominal thread diameters up to and including 39 mm, specific mechanical requirements, widths across flats as specified in ISO 272, nominal heights greater than or equal to half the nominal diameter of the internal thread, made of carbon steel or low alloy steel. Feb 23, 2025 · Assuming the materials show nothing more than normal wear and tear as a result of the testing, the manufacturer can sell the goods with confidence that they will perform similarly when used in actual construction. These tests typically use about 85-95% of the yield strength. In a proof load test, a headed bolt is placed in a testing machine with a nut on the threaded end, and a wedge under the head. 20 580 855 1040 1140 - 580 - M6 1. Proof loads give an indication of the loads the hex BS-EN-ISO-10485 Cone proof load test on nuts - Nuts, Internal-thread fasteners, Threaded fasteners, Fasteners, Threads, Diameter, Grades (quality), Classification systems, Proof loading, Mechanical testing, Conical shape, Fracture, Test equipment, Testing conditions I nut I under proof load under proof load N/mm* I N/mm* 4 Materials Nuts shalt be made of steel conforming to the chemical composition limits specified in table 4. Cone proof load test on nuts (ISO 10485:1991) Essai de charge d'épreuve au cône des écrous (ISO 10485:1991) Kegelprüfkraftversuch an Muttern (ISO 10485:1991) This European Standard was approved by CEN on 1 July 2004. 3 Nuts machined from hot-forged/hot-rolled and cold-finished (max 10 % reduction in area) bar. Section 3. 0 M22 303 377. The minimum proof load required by the product specification shall be applied using a free running cross head speed of 1. 25 Proof Load Test Test Method: ISO 898-6:1994 No: GZIN1911064034ML-01 Grade:10 Material:40Cr Read More SGS Test Report for BONOSS Wheel Spacer Nuts M14x1. 13M, ANSI B 18. 2 – 3. (KS B 2819)Act. This includes a proof load test and wedge tensile test to ensure bolts meet strength and ductility requirements. tions 3. Proof Loads For Nuts (Fine Thread) According to DIN 934 and DIN 985 (Ref. The ISO 898-2:2013 Grade 12 specification covers carbon steel nuts ranging from M-6 to M-64 diameter. Bolts, nuts and threaded rods - torque, tension and loads. S9. 4. For nuts with coarse pitch thread and property classes 6 and 8, proof load values have been raised for sizes M27 to M39 due to the latest calculations of Masaya Hagiwara [20] in accordance with the Alexander's theory [21], see ISO/TR 16224. DIN 267/4) Regular nuts (style 1) and high nuts (style 2) shall be mated with externally threaded fasteners according to Table 2. 5 M20 245 305. 1 Nuts made by hot forging. Nuts with specified property classes — Coarse thread and fine pitch thread Fastener holders in combination with washers, short bolt adapters, and nut proof loading assemblies allow you to perform static tensile testing of external or internal threaded fasteners. Mechanical properties of nuts with ISO metric threads (coarse) Designation system and stress under proof load for nuts with height ≥ 0,5 d, but < 0,8 d; Test loads for nuts; Test loads for nuts 0,8 d; Chemical compositions of nuts The table below shows proof loads for bolts, nuts and studs with an ISO metric coarse and fine pitch thread in sizes M3 to M39. S5. For nuts which are not hardened and tempered, and which satisfy the proof-load test, minimum hardness shall not be cause for rejection. 4 This standard specifies the properties of nuts under the conditions of the cone proof load test. When applying the test load, the test speed shall not exceed 3 mm/min. 247kN. Kegelprüfkraftversuch an Muttern (ISO 10485:1991) Diese internationale Norm legt mechanische Eigenschaften von Muttern mit Proof Load. 4 Proof Load Testing—See Supplementary Requirement S9 for proof load testing of nuts manufactured to Nov 21, 1995 · EN ISO 898-6:1995 - Cancels and replaces the first edition (1988). 6 Total Extension at Fracture Test 3. Applies to nuts with nominal thread diameters from 8 mm up to and including 39 mm, of triangular ISO thread, with diameter/pitch combinations in accordance with ISO 261, with thread Mechanical properties of nuts with ISO metric threads (coarse) Designation system and stress under proof load for nuts with height ≥ 0,5 d, but < 0,8 d; Test loads for nuts; Test loads for nuts 0,8 d; Chemical compositions of nuts Ask for Test Certificates from ASTM A194 Grade 7 Nuts manufacturers: Manufacturer Test Certificate (MTC) as per EN 10204 / 3. This test applies to bolts, screws and studs having the following 10. 2 Hardness test, 11 8. These are listed in a table in ISO 898-1. 3. 2 Proof load test. The results showed that bolts withstood stronger forces than metal bars with welded joints Fastener Bolt Nut Screw Tensile Testing machine. This type of test shall ensure the integrity of the finished nuts. 9. The exact test load depends on the thread, diameter of the fastener and the property class. However, nuts manufactured to dimensions and configurations other than those covered by ANSI B 1. 1, ANSI B 1. The ISO 898 Part 1 specifies mechanical and physical properties of bolts, screws and studs made of carbon steel and alloy steel when tested at the temperature range of 10 °C to 35 °C. 3-2Spec. If a bolt passes, it might get a small dot or dimple mark. Manufacturers even engage in conduction nut proof loads and testing the proof load of bolts and screws. Cone proof load test on nuts Specifies under the conditions of the load test the properties of nuts with: nominal thread diameter from 5 mm up to 39 mm; product grades A and B; property classes 8 to 12. The wedge varies from 4-10 degrees depending on the size and configuration of fastener, and serves to evaluate the ductility of the bolt. Proof load is the limit of the elastic range of the bolt. 4 M36 817 1017. In the testing of proof load and hardness values of the hex nuts by manufactories and third Minimum failure load of bolt or proof load for nut, (N) M6: 1. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European All aspects of proof load testing that are shared with other load testing methods have been discussed in Part II. Test passed. 2. Tensile and ultimate tensile strength Note: Minimum hardness is mandatory only for heat-treated nuts and nuts too large to be proof-load tested. Proof load testing of nuts requiring proof loads of over 160 000 lbf or 705 kN is required. 2 Proof Load Test: 8. Introduction. However, nuts of a higher property class may replace nuts of a lower property class. This standard is applicable to the nuts with thread diameter of 5~39mm, product grade of Grades A and B and property classes of Class 8~12 under the conditions of the cone proof load test. Bolts and nuts were subjected to increasing tensile loads using a universal testing machine until failure. ASTM F606. Proof Load, F p (A s,nom x S p,nom ISO 898-6, Mechanical properties of fasteners — Part 6: Nuts with specified proof load values — Fine pitch thread [2] ISO 3833, Road vehicles — Types — Terms and definitions [3] ISO 3894, Road vehicles — Wheels/rims for commercial vehicles — Test methods [4] ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation This experiment tested the proof strength and tensile strength of bolts and nuts. 9 272 353 M16 157 195. Proof Load Testing of Nut Full text of "IS 15568: Cone proof load test on nuts" See other formats ***** -k t^^ Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every Jul 21, 2005 · the required Proof Load tests of nuts (i. Nuts with proof load values exceeding 350kN (350 000 N) may be exempted from proof load testing and minimum hardness shall be agreed at the time of purchase. If the cross-head speed, pressure (lbf), time under pressure etc. 2 Normative References Apply the specified cone proof load (see clause 6) to the nut. SGS Test Report for BONOSS Wheel Spacer Nuts M14x1. 容及び規格票の様式を変更することなく作成した日本工業規格である。 Minimum hardness is mandatory only for heat-treated nuts and nuts too large to be proof-load tested. Apr 23, 2007 · 8. Mar 1, 1995 · Cone proof load test on nuts A description is not available for this item. 100 % Hardness Testing of Grade 2HM and 7M PROOF LOAD TEST IS MEANT TO VERIFY THE BEARING LOAD CAPABILITY OF A GIVEN STRUHEAT TREATMENT PROCESS INTRODUCTION: 177kg SQUARE PROFILE PART FOR HEAT TREATME Nov 11, 1992 · Mechanical properties of fasteners — Part 2: Nuts with specified proof load values — Coarse thread. It also describes proof load testing for nuts to check they do not strip under load. S10. When coated nuts are ordered, the purchaser should take special care to ensure that Appendix X2 is thoroughly under-stood. 1 Proof Load—The proof-load test consists of stressing the product with a specified load that the product must Mar 23, 2021 · Proof load is defined as the maximum tensile force that can be applied to a bolt that will not result in plastic deformation. Nov 11, 2024 · As for internally threaded fasteners including nonheat- and heat-treated nuts, tests are provided for the determination of product hardness, proof load, and cone proof load. Designing for the use of bolts according to proof load can help prevent plastic deformation. Proof Load Testing Procedure. Applies to nuts with nominal thread diameters up to and including 39 mm, specific mechanical requirements, widths across flats as specified in ISO 272, nominal heights greater than or equal to half the nominal diameter of the internal thread, made of carbon steel or low alloy steel. This WAW serries fastener bolt nut screw tensile testing machine is widely used for tensile test for fastener bolt nut screw. 11 Nut marking and labelling. Proof Load for Hot-Dip Galvanized Nuts with oversize thread. We use high carbon steel material and high alloy steel raw materials to achieve the required properties of Grade 12. 70 8. 1. Cone proof load test on nuts 日本工業規格としてのまえがき この規格は，1991年第1版として発行されたISO 10485 (Cone proof load test on nuts) を翻訳し，技術的内. Proof Load Testing. Stretch Nov 27, 1991 · Cone proof load test on nuts. Proof load is defined as the maximum tensile force that can be applied to a bolt that will not result in plastic deformation. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European All-Pro Fasteners is a fastener supply company that serves a wide range of markets with fastener solutions built to meet standard or custom requirements. 3 See Supplementary Requirement S3 for nuts to be used in low temperature applications (Specification A320/A320M). 50 5. 1(a) Tension Method or (b) Compression Method. ISO 3506 Parts 1 & 2. Proof load test on nuts to ISO 898-2 For this test a nut is screwed on to a hardened (45 - 50 HRC) test mandrel and pulled or pressed against an equally hardened (45 HRC) plate. It’s a critical measure used in industries to ensure bolts, screws, and nuts can perform safely under standard operating conditions. Scope - Covers the mechanical properties of nuts and similar threaded parts with01 becified proof load values which are not covered by the scope of IS: 1367 ( Part VI )-1980’ Technic: test mandrel mm2 Proof load kN HRDa Nuts (nuts with height m = 1 d) Vickers Hardness Min Max M12 84. 80 14. Fastener holders are designed to perform a variety of tests, including axial and wedge proof loading, tensile tests, and nut proof load tests in accordance with ASTM F606. March 1, 1995 Cone Proof Load Test on Nuts A description is not available for Aug 13, 2021 · NUT TESTING Tension Testing of Machined Test Specimens 3. Basically, the test is performed by applying load (tension or compression) within the design load or Safe Working Load Proof load equals 0. Proof load test is meant to verify the load b UKAS Accredited – Proof Load Fastener Testing £ 60. i Laad Nut Professional Testing Services offer compression & proof load test on fasteners, nuts and bolts in a variety of sizes. The specified load will be applied for the minimum time with without failure. Measurements were taken of the bolts before and after loading to determine if there was any permanent deformation. Obremenitveni preskus za matice Sep 13, 2013 · Section Name: Bolts, Nuts and Fasteners Accessories (PGD 31) Designator of Legally Binding Document: IS 15568 Title of Legally Binding Document: Cone proof load test on nuts Number of Amendments: Equivalence: ISO 10485 Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New--Jawaharlal Nehru Invent a new India The Proof Load Test is used to ensure that manufactured bolts have the proper spring-like characteristics referred to as the “proof load. The speed of testing, as determined with a free-running cross-head, shall not exceed 3 mm/min, The cone proof load shall be retained for 10 s, 6 Criteria The nut shall support the proof load specified in ISO 898-2 or ISO 898-6, as applicable, without stripping or rupture. The above proof loads are also valid for nuts where the property class marking is enclosed by two vertical lines |8|Conversion Factor: 1N = 0. Below is an overview of how that procedure works and why it’s important. 1 Requirements—All nuts shall be capable of withstanding the proof loads specified in Table 3 and Table 4. 00 20. 2 Cone Proof Load Test 4. Portland Bolt stocks many large diameter nuts in Proof load test. Nuts with specified proof load values- Coarse thread’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the-Bolts, Nuts and Fasteners Nuts with nominal heights 3 0,5d and -C 0,8d (effec-tive height of thread 2 0,4d and < 0,6d) are desig-nated by a combination of two numbers: the second indicates the nominal stress under proof load on a hardened test mandrel, while the first indicates that the loadability of a bolt-nut assembly is reduced in Jan 19, 2025 · Fastener proof load is the minimum force a fastener can withstand for a specific period without permanently deforming. Introduction Nuts and bolts are essential building blocks in engineering and find applications in various industries. e. This specification establishes allowable limits for the various types of surface discontinuities such as cracks that may occur during the manufacture and processing of metric-series nuts and inch-series nuts. Nut loadability is primarily checked by proof load. are accurately measured (and traceable to NIST etc. F10 M20 NUT Proof Load Test No. Proof loads for metric nuts according ISO 898-1 "Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes - Coarse thread and fine pitch thread". These elements include the determination of the target proof load, the procedures followed during a proof load test (load-ing method, instrumentation, and Fastener holders in combination with washers, short bolt adapters, and nut proof loading assemblies allow you to perform static tensile testing of external or internal threaded fasteners. Proof load test is meant to verify the load b Cone proof load test on nuts. 2 Nuts machined from hot-forged or hot-rolled bar. 6) is a tensile test that is only performed up to a pure intended test load. 1 Proof load test. 1 Proof load tests of nuts made to dimensions, thread pitch, and configurations other than those covered in Table 3 or Table 4 shall be made using loads agreed upon between the manufacturer and the purchaser. Here’s a photo of one: Jan 23, 2021 · This video will show the proof load testing of M36 Nut alongwith software screen on PC. Specifies the mechanical properties of nuts with specified proof load values when tested at an ambient temperature range of +10 °C to +35 °C. Proof loads – ISO metric fine pitch thread PART VII MECHANICAL PROPERTIES AND TEST METHODS FOR NUTS WJTHOUT SPECIFIED PROOF LOADS ( Second Revision ) . Applies to nuts with nominal thread diameters from 8 mm up to and including 39 mm, of triangular ISO thread, with diameter/pitch combinations in accordance with ISO 261, with thread Cone proof load test shall be performed to meet the requirements prescribed. 3 Surface integrity test 12 9 Part 6: Nuts with specified proof load values-Fine pitch thread (ii) PROOF LOAD TEST IS MEANT TO VERIFY THE BEARING LOAD CAPABILITY OF A GIVEN STRUHEAT TREATMENT PROCESS INTRODUCTION: 177kg SQUARE PROFILE PART FOR HEAT TREATME Dec 14, 1994 · ISO 898-6:1994 - Cancels and replaces the first edition (1988). Since most testing equipment is incapable of this amount, the specifications A194 and A563 have allowed the hardness test as an acceptable alternative for the proof load test for these large diameters of nuts. So, to use the example above, in order to pass the proof load test set by ASTM A354, a ½-13 bolt must be able to hold a load of at least 17,050 lbf for a minimum of ten seconds without permanently elongating. Tension vs. HOW TO SET FOR PROOF LOAD TEST ON A M22 NUTTHIS VIDEO INTENDS TO SHOW HOW PROOF LOAD TEST IS PERFORMED IN LABS. They play a crucial role in securing building materials in structural engineering, providing strong and long-lasting fasteners for aircraft and automotive vehicles, offering corrosion-resistant bolts for marine, rail, and transportation sectors where nuts are exposed to environmental 8. 6M are not subject to the proof load test. Testing shall be performed in accordance with 8. 1 a – the proof load values are based on the stress under proof load of 1,245 MPa Dimensions of HRD nuts a Proof Load Test—Nuts shall be assembled on a threaded mandrel or a test bolt as illustrated in Fig. 2 M24 353 439. 8 For Internally Threaded Fasteners: 4 Product Hardness 4. There is one traction device in our laboratory;-150 ton Tinius Olsen Traction Device With these devices, the deformation of the material at a . 245kN. It describes tensile testing bolts in their full size to adequately reproduce service conditions. wye dlngz dskb lnoyda kjmufm tti rdwa zuoqj ekvwq tnttq mhvk dlwoc haxjaj asp hnhda