S-91746A860 8-32 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with knurled round head design for easy manual tightening without tools
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
• High mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing performance
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fastening and vibration resistance
• Optimized partial threading (7/16" length) providing secure clamping while minimizing thread damage risks
• Dual drive compatibility through combined knurled head and slotted drive for flexible installation options
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 8-32 UNC thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-less operation. The 18-8 stainless steel composition provides inherent corrosion resistance, making it suitable for electronic enclosures, machinery panels, and laboratory equipment where moisture or chemicals are present. The knurled head with slotted drive offers dual functionality - the knurling ensures positive grip during manual operation while the slot accommodates standard screwdrivers for final tightening. With its coarse thread spacing and Class 2A thread fit, this fastener maintains reliable engagement in vibration-prone environments, reducing maintenance frequency. The partially threaded design concentrates threading where needed most, preventing cross-threading while providing sufficient engagement depth for secure fastening in panels, brackets, and access covers.

Specification Summary & Compliance

This thumb screw features precision 8-32 UNC threads with Class 2A tolerance for consistent fit and performance. The 0.164" thread diameter with coarse thread spacing ensures rapid installation and reliable holding power. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material restrictions adherence. The right-hand thread direction and narrow profile round head design follow industry-standard configurations for compatibility with existing assemblies and applications.