S-90521A257 1"-12 ASME B18.2.2, ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution due to the extra wide profile, reducing surface pressure and preventing material damage in heavy-duty applications
• Superior vibration resistance provided by the 1"-12 UNF fine threading, ensuring secure, long-lasting fastening in high-stress environments
• High tensile strength and reliability from ASTM Grade 2H steel, suitable for critical assemblies requiring consistent performance
• Precise, reliable thread engagement with Class 2B thread fit, minimizing the risk of cross-threading and ensuring smooth installation
• Broad compatibility and standardization through compliance with ASME B18.2.2 and ASTM A194, guaranteeing interchangeability and quality
• Safe for sensitive applications with RoHS 3 and REACH compliance, making it ideal for industries with strict environmental regulations
• Easy installation and removal with the external hex drive style, allowing for standard wrenching tools and efficient maintenance

Professional Applications & Engineering Value

This Grade 2H steel hex nut with 1"-12 UNF fine threading is engineered to address common industrial challenges such as joint failure under dynamic loads and corrosion in harsh environments. The extra wide profile increases the bearing surface, distributing clamp load more effectively to prevent loosening and damage to connected materials. Made from high-strength ASTM Grade 2H steel, it offers excellent durability and resistance to wear, making it ideal for heavy machinery, structural frameworks, and automotive assemblies. The fine thread design enhances grip in softer materials and provides superior holding power in vibrating systems. Coupled with a Class 2B thread fit, it ensures precise alignment and reduces installation errors, streamlining production and maintenance processes while meeting rigorous industry standards.

Specification Summary & Compliance

This hex nut features a 1"-12 UNF fine thread with Class 2B thread fit for consistent dimensional accuracy. It complies with ASME B18.2.2 and ASTM A194 manufacturing specifications, ensuring reliable performance. The nut is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental safety standards. Dimensions include a width of 1 5/8" and height of 63/64", supporting its use in demanding industrial applications.