S-99937A108 3/8"-16 Thumb Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• Effortless hand-tightening provided by the large 3/4" knurled round head for quick assembly without tools
• Enhanced load distribution and vibration resistance from the integrated 5/8" flange design
• Reliable coarse threading with UNC 3/8"-16 specification and Class 2B fit for secure fastening in demanding applications
• Durable right-hand threading ensures compatibility with standard industrial components
• Full regulatory compliance with RoHS 3 and REACH standards for safe use across global markets
• Optimized height profile (15/32") for space-constrained applications while maintaining structural integrity

Professional Applications & Engineering Value

This 316 stainless steel thumb nut delivers exceptional performance in corrosive environments where tool-free maintenance is critical. The flanged design provides superior bearing surface distribution, reducing point stress and preventing surface damage during repeated hand-tightening cycles. The knurled round head offers positive grip even with oily gloves, while the UNC coarse threading ensures rapid installation and removal in maintenance-heavy applications. Ideal for industrial equipment, marine hardware, and processing systems requiring frequent access, this thumb nut combines the corrosion resistance of 316 stainless with the practical benefits of hand-tightening convenience and flange stability.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit and UNC 3/8"-16 coarse threading. The component features a 5/8" collar diameter, 1/4" collar height, and fully threaded right-hand configuration. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted industrial use across international markets.