S-99862A520 5/16"-18 Thumb Nuts

Key Features & Benefits at a Glance

• Effortless manual tightening with 1-1/4" wide wings for superior grip without tools
• Durable corrosion resistance thanks to high-quality zinc alloy construction
• Reliable thread engagement with 5/16"-18 UNC coarse threads and Class 2B fit
• Quick installation enabled by right-hand thread direction for standard applications
• Stable seating provided by 1/2" base diameter for secure fastening
• Enhanced torque application from 1" height design for better leverage
• Safe for regulated industries with full RoHS 3 and REACH compliance

Professional Applications & Engineering Value

This zinc alloy thumb nut solves critical assembly challenges in maintenance, machinery, and equipment where frequent adjustments are needed. The standard wing profile and coarse UNC threads allow rapid hand-tightening in tight spaces, reducing downtime. Its zinc alloy material offers excellent durability against wear and mild corrosion, ideal for industrial environments. The Class 2B thread fit ensures consistent performance with standard bolts, preventing cross-threading. Perfect for manual fastening in automotive, electrical enclosures, and production line fixtures, it combines ergonomic design with robust engineering.

Specification Summary & Compliance

This thumb nut meets UNC thread standards with 5/16"-18 coarse threads and Class 2B thread fit for precise dimensional accuracy. It adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. Manufactured to inch system measurements, it features a right-hand thread direction and standard wing nut profile for broad compatibility.