S-97135A404 1 1/4"-8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking that maintains secure fastening in high-stress environments
• Exceptional corrosion protection with zinc yellow-chromate plating that extends service life in harsh industrial conditions
• High-temperature capability with nylon insert rated for continuous operation up to 220°F without performance degradation
• Premium strength performance meeting Grade 8 specifications for heavy-duty applications requiring maximum load capacity
• Reliable thread engagement with Class 2B thread fit ensuring smooth installation and consistent clamping force
• Easy installation and removal using standard external hex drive compatible with common wrenching tools
• Optimized for coarse threading with UNC 1 1/4"-8 threads providing excellent resistance to loosening under dynamic loads

Professional Applications & Engineering Value

This Grade 8 nylon insert lock nut delivers critical vibration resistance in demanding mechanical systems where reliable locking performance is non-negotiable. The zinc yellow-chromate plated steel construction provides exceptional corrosion protection, making it ideal for outdoor equipment, industrial machinery, and automotive applications exposed to environmental elements. The nylon insert creates consistent friction against mating threads, effectively preventing spontaneous loosening from shock loads and continuous vibration. With its UNC coarse thread profile and Class 2B thread fit, this heavy-duty external hex locknut ensures straightforward installation while maintaining precise tolerances for engineering-critical assemblies. The 220°F temperature rating makes it suitable for engine compartments, hydraulic systems, and other high-temperature environments where conventional locking methods may fail.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNC standards with precise dimensional accuracy (2 1/64" width × 1 41/64" height). Manufactured to Grade 8 strength classification requirements with right-hand UNC 1 1/4"-8 coarse threads. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection while the nylon insert meets industry standards for vibration-resistant fastening applications.