S-91746A966 8-40 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and prolonged outdoor use
• Exceptional tensile strength of 80,000 psi ensures reliable, vibration-resistant fastening in demanding applications
• Enhanced user grip and torque application thanks to the fully knurled round head design, allowing for quick hand-tightening without tools
• Precise thread engagement with 8-40 extra fine thread and Class 2A fit, providing secure fastening in thin materials and fine adjustments
• Full threading along the 3/4" length offers maximum holding power and versatility across various material thicknesses
• Consistent mechanical performance backed by Rockwell B83 hardness, resisting wear and deformation under load
• Environmental compliance assurance with RoHS 3 and REACH standards, meeting global regulatory requirements for safe usage

Professional Applications & Engineering Value

This 18-8 stainless steel thumb screw is engineered to address common industrial challenges such as corrosion in humid or chemical-exposed environments and the need for quick, tool-free assembly and disassembly. The knurled round head provides excellent manual grip, reducing installation time and minimizing the risk of stripping compared to standard slotted drives. Its 8-40 extra fine thread and Class 2A thread fit ensure precise, secure fastening in applications like electronic enclosures, precision instruments, and optical devices where fine adjustments and vibration resistance are critical. The fully threaded design and high tensile strength make it a reliable choice for maintaining clamp load in dynamic settings, offering engineers a durable, corrosion-resistant fastening solution that upholds performance standards without compromising on ease of use.

Specification Summary & Compliance

This thumb screw adheres to UNS thread standards with an 8-40 extra fine thread size and Class 2A thread fit for consistent dimensional accuracy. It is fully threaded with a right-hand thread direction and measures 3/4" in length. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.