S-90499A858 1 1/8"-12 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 strength classification, ensuring reliable performance in high-stress industrial environments
• Superior vibration resistance through UNF fine thread design that maintains secure fastening under dynamic loading conditions
• Precise thread engagement with Class 2B fit providing consistent torque values and reduced risk of cross-threading during assembly
• Enhanced durability from steel construction offering excellent corrosion resistance and long-term service life
• Optimized installation efficiency with standard external hex drive profile allowing for quick application using common tools
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use across global industrial markets
• Right-hand thread orientation ensuring compatibility with standard assembly procedures and replacement part inventories

Professional Applications & Engineering Value

This Grade 8 steel hex nut delivers critical performance advantages in demanding applications where vibration resistance and high tensile strength are paramount. The 1 1/8"-12 UNF fine thread configuration provides superior holding power in machinery, heavy equipment, and structural assemblies subjected to dynamic stresses. Engineered with Class 2B thread fit, this fastener ensures precise engagement with mating components while accommodating minor misalignments during installation. The standard hex profile with external drive design enables efficient torque application using conventional wrenches, reducing assembly time in manufacturing and maintenance operations. Particularly valuable in automotive, construction, and industrial machinery sectors, this heavy-duty hex nut solves common challenges of thread stripping, loosening under vibration, and premature failure in critical connections.

Specification Summary & Compliance

This hex nut features 1 1/8"-12 UNF fine thread with Class 2B thread fit per unified thread standards, ensuring precise dimensional accuracy and reliable mating performance. The fastener meets Grade 8 strength requirements with mechanical properties suitable for high-stress applications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and restricted substance compliance. Physical dimensions include 1 11/16" width across flats and 31/32" height, providing standard wrench clearance while maintaining robust structural integrity.