S-99291A580 7/16"-14 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread top lock technology that maintains clamp force in high-stress environments
• Enhanced corrosion protection with zinc-flake coating that provides excellent durability in harsh industrial conditions
• Reliable performance under load with ASTM Grade C strength classification ensuring consistent mechanical properties
• Precise thread engagement with Class 2B thread fit for smooth assembly and secure fastening
• Easy installation and removal using standard wrenches thanks to the external hex drive design
• Optimal thread compatibility with 7/16"-14 UNC coarse threads for robust connections in heavy machinery
• Environmental compliance assurance meeting both RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

This heavy-duty locknut with distorted thread technology addresses critical vibration-induced loosening challenges in industrial equipment, construction machinery, and automotive assemblies. The zinc-flake-coated steel construction provides exceptional corrosion resistance while maintaining ASTM Grade C mechanical strength, making it ideal for exposed or high-stress environments. The top lock distorted thread design creates consistent interference that prevents back-off without requiring additional locking elements, simplifying inventory and assembly processes. With 7/16"-14 UNC coarse threads and Class 2B thread fit, this external hex locknut ensures reliable performance in applications where vibration, dynamic loads, and thermal cycling would compromise standard fasteners.

Specification Summary & Compliance

This locknut features precise Class 2B thread fit according to UNC standards with 7/16"-14 coarse threading and right-hand direction. Manufacturing complies with ASTM Grade C specifications for consistent strength performance. The product meets RoHS 3 (2015/863/EU) compliance and is REACH (EC 1907/2006) compliant as of June 10, 2022, with 224 SVHC substances addressed. Physical dimensions include 11/16" width across flats and 3/8" height for standardized tool compatibility.