S-97619A920 1 1/8"-8 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to premium 316 stainless steel construction
• Superior load distribution and reduced surface pressure from the extra wide hex profile design
• High mechanical strength and reliability guaranteed by the ASTM Grade 8M classification
• Faster assembly and reduced cross-threading risk with the coarse (8 TPI) thread pitch
• Consistent and reliable thread engagement ensured by the Class 2B thread fit for inch-series applications
• Compliance with major environmental and safety regulations, including RoHS 3 and REACH
• Broad industry compatibility by meeting ASTM A194 manufacturing specifications

Professional Applications & Engineering Value

This heavy-duty hex nut is engineered to solve critical challenges in demanding industrial settings. The core value lies in its 316 stainless steel composition, which provides outstanding resistance to corrosion from chemicals, saltwater, and extreme weather, significantly extending service life in marine, chemical processing, and outdoor infrastructure. The extra wide profile increases the bearing surface area, effectively distributing clamp load and preventing joint loosening under high vibration or dynamic loads. Combined with the coarse thread (1 1/8"-8) and Class 2B fit, it ensures quick, secure installation and reliable performance in structural assemblies, heavy machinery, and large-diameter bolting applications where strength and durability are non-negotiable.

Specification Summary & Compliance

This nut conforms to UN coarse thread standards with a size of 1 1/8"-8 and a Class 2B thread fit for consistent assembly. It is manufactured in compliance with ASTM A194 and meets the mechanical property requirements of ASTM Grade 8M. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances for safe use in global markets.