S-91830A102 4-40 x 3/8" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Excellent tensile strength of 80,000 psi ensures reliable fastening under high-stress conditions
• Enhanced grip and easy manual operation with knurled round head design, eliminating the need for tools
• Precise thread engagement with Class 2A UNC coarse threads for quick assembly and reduced cross-threading risk
• Full threading along the 3/8" length provides maximum adjustability and holding power
• Consistent hardness at Rockwell B83 maintains structural integrity through repeated use
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This 4-40 UNC thumb screw in 18-8 stainless steel addresses critical needs in industrial assembly and maintenance. The knurled round head offers exceptional tactile control for quick adjustments in tight spaces, while the coarse UNC threading ensures rapid installation without sacrificing holding strength. With an 80,000 psi tensile strength and full threading, it provides secure fastening for electronic enclosures, machinery panels, and instrumentation where frequent access is required. The corrosion-resistant material and Class 2A thread fit deliver long-term reliability in demanding environments, reducing maintenance cycles and downtime.

Specification Summary & Compliance

Manufactured to precise UNC thread standards with Class 2A tolerance for consistent fit. Features a 3/8" length, fully threaded coarse spacing, and right-hand thread direction. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international safety and material restrictions.