S-91185A285 8-32 x 1/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and comfort with Acetal Plastic knurled head for secure manual tightening without tools
• Superior corrosion resistance from 18-8 Stainless Steel construction, ideal for demanding industrial environments
• Precise thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant fastening
• Quick installation and removal facilitated by the low-profile round head and right-hand coarse UNC threading
• Durability in moderate temperatures with head operating range from 32° to 180° F for varied applications
• Full thread coverage along the 1/4" length for maximum holding power and alignment flexibility
• Environmental and safety compliance meeting RoHS 3 and REACH standards for responsible manufacturing

Professional Applications & Engineering Value

This 8-32 UNC thumb screw combines the strength of 18-8 Stainless Steel with the ergonomic benefits of an Acetal Plastic knurled head, addressing common assembly challenges in electronics, machinery, and instrumentation. The coarse thread and Class 3A fit provide rapid, secure fastening in materials where fine threads might strip, reducing installation time and improving reliability. The low-profile round head offers a compact solution for tight spaces, while the fully threaded design ensures consistent clamping force. Ideal for frequent adjustments, this screw eliminates the need for tools, streamlining maintenance and reducing labor costs in industrial applications.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 3A thread fit for high precision and durability. Key dimensions include a 1/4" length, 8-32 thread size, and 1/2" head diameter. It is fully manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global supply chains.