S-91185A813 1/4"-20 x 1 1/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual operation with multi-lobe plastic head for superior grip and tool-free tightening/loosening
• Excellent corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemical environments
• Precise thread engagement with Class 3A fit and UNC coarse threads ensuring reliable fastening in industrial assemblies
• Durable plastic head made from Acetal that withstands temperatures from 32° to 180°F without degradation
• Full threading design provides maximum adjustability and holding power along the entire 1 1/4" length
• Regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Right-hand threading offers intuitive installation compatible with standard industrial equipment

Professional Applications & Engineering Value

This 1/4"-20 thumb screw combines the corrosion-resistant properties of 18-8 stainless steel with the ergonomic advantages of a black Acetal Plastic multi-lobe head to solve critical assembly challenges. The fully threaded design ensures maximum contact surface for vibration resistance in machinery, enclosures, and access panels. Engineers benefit from the Class 3A thread fit and UNC coarse threading which prevent cross-threading while enabling rapid installation in maintenance applications. The plastic head eliminates galvanic corrosion risks when mating with dissimilar metals and provides electrical insulation. Ideal for frequent-adjustment scenarios in industrial equipment, electronic enclosures, and manufacturing jigs where tool-less operation and corrosion resistance are paramount.

Specification Summary & Compliance

This thumb screw features precision 1/4"-20 UNC coarse threads with Class 3A fit for superior thread engagement. The right-hand threaded, fully threaded design spans the complete 1 1/4" length. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance compliance for industrial and commercial applications.