S-90630A205 1 1/4"-12 Locknuts

Key Features & Benefits at a Glance

• Vibration-resistant locking through nylon insert that maintains secure fastening in high-vibration environments
• Exceptional strength performance with Grade 8 steel construction for heavy-duty industrial applications
• High-temperature capability with nylon insert rated up to 220°F for demanding operating conditions
• Precise thread engagement with Class 2B thread fit ensuring reliable, consistent installation
• Easy installation and removal with standard external hex drive design using common tools
• Fine thread advantage with 1 1/4"-12 UNF threads providing superior resistance to loosening
• Environmental compliance meeting REACH and RoHS 3 standards for global industrial use

Professional Applications & Engineering Value

This Grade 8 steel nylon insert locknut delivers critical vibration resistance in demanding industrial environments where fastener failure is not an option. The nylon insert locking mechanism creates consistent friction against mating threads, effectively preventing loosening from machinery vibration, impact loads, and thermal cycling. Engineered with UNF fine threads (1 1/4"-12), this external hex locknut provides superior clamping force distribution and enhanced resistance to vibrational loosening compared to coarse thread alternatives. The 220°F temperature rating ensures reliable performance in engine compartments, industrial machinery, and equipment subjected to thermal stress. With its heavy-duty construction and precise Class 2B thread fit, this locknut solves critical fastening challenges in automotive, manufacturing, and heavy equipment applications where safety and reliability are paramount.

Specification Summary & Compliance

This locknut features 1 1/4"-12 UNF fine threads with Class 2B thread fit for precise engagement and reliable performance. The external hex drive measures 1 13/16" across flats with a height of 1 25/64". Manufactured from Grade 8 steel with right-hand thread direction, this component is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring suitability for regulated industrial applications worldwide.