S-91185A410 1/4"-20 x 7/8" Thumb Screws

Key Features & Benefits at a Glance

• Superior grip and torque application with knurled acetal plastic head for reliable hand-tightening without tools
• Exceptional corrosion resistance from 18-8 stainless steel construction for long-term durability in harsh environments
• Precise thread engagement with Class 3A UNC coarse threading ensuring secure fastening and vibration resistance
• Low-profile design enables use in space-constrained applications while maintaining easy manual operation
• Wide temperature tolerance (32° to 180°F) for stable performance across various industrial conditions
• Full threading along 7/8" length provides maximum adjustability and holding power
• Regulatory compliance with RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

This low profile thumb screw combines the corrosion-resistant properties of 18-8 stainless steel with the exceptional grip of a knurled acetal plastic head, creating an ideal solution for frequent adjustment applications in industrial settings. The UNC coarse threading with Class 3A fit ensures rapid installation and removal while maintaining precise thread engagement, significantly reducing assembly time in production environments. The fully threaded 7/8" length provides maximum thread contact for secure fastening in electronic enclosures, machinery panels, and test equipment where tool-less access is required. The right-hand thread direction follows standard industry conventions, while the low-profile round head design prevents snagging in confined spaces, making it particularly valuable for aerospace, automotive, and electronics applications requiring reliable, reusable fastening solutions.

Specification Summary & Compliance

This thumb screw features precision 1/4"-20 UNC coarse threading with Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured from 18-8 stainless steel with an acetal plastic knurled head, the fastener is fully threaded along its 7/8" length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and chemical safety in industrial applications.