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Introduction The ISO 4017:2022 standard specifies the characteristics of hexagon head screws with threads from M1.6 to M64, of product grades A and B. This standard is crucial in mechanical engineering and manufacturing industries, ensuring uniformity and reliability in fastening components. It...

Introduction ISO 4762-2004 specifies the characteristics of hexagon socket head cap screws with coarse pitch threads, ranging from M1.6 up to M64, and product grade A. This standard is essential in mechanical engineering for ensuring reliable fastening in various applications, such as machinery...

GB 944.1-1985: Cross Recesses for Screws Standard Introduction This standard, GB 944.1-1985, specifies the dimensions and requirements for cross recesses used in screws, including Phillips-type designs. Cross recesses are essential in fastening applications, providing improved torque transmission...

GB/T 6188-2017 Hexalobular Internal Drive for Bolts Introduction The hexalobular internal driving feature, commonly known as Torx or hexalobe, enhances torque transmission and reduces cam-out in fasteners. This design is critical in high-performance applications across automotive, aerospace, and...

ISO 7047-2011 Cross Recess Raised Countersunk Screws Introduction The ISO 7047-2011 standard addresses the specifications for raised countersunk head screws with cross recess, which are essential fasteners in various mechanical and engineering applications. These screws, characterized by their...

GB/T 6172.2-2016 Hex Thin Lock Nuts Non-Metallic Insert 1. Introduction Hexagon thin lock nuts with non-metallic inserts are essential fasteners in mechanical engineering, providing reliable locking mechanisms to prevent loosening under vibration. The GB/T 6172.2-2016 standard specifies the...

GB/T 3103.3-2020 Flat Washer Tolerances Guide Tolerances for Flat Washers 1. Introduction Flat washers play a critical role in fastening systems by distributing loads, preventing surface damage, and ensuring assembly integrity. The GB/T 3103.3-2020 standard specifies tolerances for plain flat...

Introduction GB/T 3098.9-2020 specifies the mechanical properties of torque-controlled steel lock nuts, which are designed to provide reliable locking performance through prevailing torque. This standard covers property classes including 04, 05, 5, 6, 8, and 10 for nuts with thread diameters from...

Introduction This article details the mechanical performance standards for self-drilling tapping screws as outlined in GB/T 3098.11-2002. These standards ensure the reliability and functionality of self-drilling screws in fastening applications, covering materials, metallurgical properties, and...

GB/T 3098.5-2016 specifies the mechanical properties of self-tapping screws, ensuring their reliability in fastening applications across industries such as automotive, construction, and electronics. This standard outlines requirements for surface hardness, case depth, core hardness, test plate...

Introduction GB/T 3098.4 is a Chinese national standard that specifies the mechanical properties of fine pitch thread nuts for fasteners. This standard covers marking systems, materials, and mechanical performance requirements for nuts with fine threads, ensuring compatibility with bolts, screws,...

Introduction GB/T 3098.8 specifies the mechanical properties, materials, testing, identification marks, and markings for fasteners used in bolted connections operating within the temperature range of -200℃ to +700℃. This standard applies to bolts, screws, studs, and nuts made from austenitic...

GB/T3098.7-2000 specifies the mechanical properties of self-tapping screws made from carburized steel. This standard ensures that these fasteners meet rigorous performance criteria for applications requiring reliable threading and strength. Below, we detail the key aspects of materials, mechanical...

GB/T 3098.6-2014 specifies the mechanical properties of bolts, screws, and studs made from corrosion-resistant stainless steels when tested at an ambient temperature range of 10°C to 35°C. This standard applies to fasteners with nominal thread diameters from 5 mm to 100 mm, ensuring reliable...

GB/T 3098.1-2010 specifies the mechanical properties of bolts, screws, and studs made of carbon steel and alloy steel. This standard defines property classes, materials, and performance requirements to ensure reliability in various applications. It applies to fasteners with nominal thread...

GB/T 3098.2-2015 specifies the mechanical properties of coarse thread nuts made from carbon steel and alloy steel, applicable for general engineering purposes. This standard aligns closely with international norms such as ISO 898-2, ensuring compatibility in fastener systems. It covers performance...

Introduction As a seasoned mechanical materials expert, I have extensively worked with national and international standards for fasteners, including those governing set screws. GB/T 3098.3-2016 is a critical Chinese national standard that specifies the mechanical properties of set screws, ensuring...