S-94450A538 1 1/4"-12 ANSI/ASME 18.2.2 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction for long-lasting performance in harsh environments
• Secure reverse-thread locking with left-hand UNF fine threads to prevent loosening under counter-clockwise rotation
• Space-saving thin profile (23/32" height) ideal for applications with limited clearance while maintaining full strength
• Precision thread engagement with Class 2B fit ensuring consistent, reliable fastening without binding
• Standard-compliant reliability meeting ANSI/ASME 18.2.2 specifications for guaranteed interchangeability
• Enhanced tool access with external hex drive and 1 7/8" width for easy installation and removal
• Environmental compliance with RoHS 3 and REACH regulations for safe use in regulated industries

Professional Applications & Engineering Value

This left hand thin hex nut provides critical reverse-thread security for rotating machinery, conveyor systems, and equipment where standard right-hand threads would naturally loosen. The 18-8 Stainless Steel construction delivers superior corrosion resistance in chemical processing, marine, and food industry applications, while the UNF fine thread configuration offers enhanced vibration resistance compared to coarse threads. The thin profile design solves clearance issues in compact assemblies without compromising strength, making it ideal for precision equipment, automotive components, and industrial machinery where space optimization is crucial. Engineered to ANSI/ASME 18.2.2 standards, this fastener ensures reliable performance in high-stress applications requiring left-hand thread security.

Specification Summary & Compliance

This precision 1 1/4"-12 UNF left hand thin hex nut features Class 2B thread fit for consistent engagement and meets ANSI/ASME 18.2.2 manufacturing specifications. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. With dimensions of 1 7/8" width and 23/32" height, this fine thread hex nut maintains exacting dimensional tolerances for reliable performance in demanding applications.