S-93126A110 1 1/4"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening in high-motion environments
• Enhanced corrosion protection with black-phosphate steel construction for extended service life in demanding conditions
• Space-saving installation with extra-wide thin profile design that provides full bearing surface while minimizing overall height
• High-temperature capability with nylon insert rated to 250°F (121°C) for reliable performance in thermal cycling applications
• Precise thread engagement with Class 2B fine UNF threads ensuring consistent clamping force and reduced loosening risk
• Heavy-duty performance meeting ASTM Grade C specifications for demanding industrial applications
• Easy installation and removal with standard external hex drive compatible with common wrenching tools

Professional Applications & Engineering Value

This 1 1/4"-12 UNF nylon insert locknut delivers critical vibration resistance in heavy machinery, automotive assemblies, and industrial equipment where constant motion threatens fastener integrity. The black-phosphate steel construction provides essential corrosion protection in environments exposed to moisture and chemicals, while the extra-wide thin profile offers maximum clamping area in space-constrained applications. Engineered with fine UNF threads and Class 2B thread fit, this locknut maintains precise alignment and consistent preload in high-vibration scenarios. The nylon insert locking mechanism creates reliable friction-based retention without damaging mating threads, making it ideal for applications requiring repeated disassembly and reassembly. These features combine to solve common industrial challenges of fastener loosening, thread damage, and corrosion-induced failure.

Specification Summary & Compliance

This locknut features 1 1/4"-12 UNF fine threads with Class 2B thread fit for precision engagement, measuring 2" in width and 1 7/64" in height. Manufactured from black-phosphate steel with external hex drive and nylon insert locking technology rated to 250°F. Complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, and meets ASTM Grade C strength requirements for industrial fastener applications.