S-91185A859 5/16"-24 x 1 1/4" Thumb Screws

Key Features & Benefits at a Glance

• Easy manual installation with multi-lobe thumb head design for superior grip without tools
• Corrosion-resistant performance from 18-8 stainless steel construction in demanding environments
• Precise thread engagement with Class 3A fine UNF threads ensuring reliable fastening in precision assemblies
• Durable head material using black Acetal Plastic that withstands temperatures from 32° to 180° F
• Full threading along 1 1/4" length provides consistent holding power across the entire fastener
• Right-hand thread direction offers standard, intuitive tightening for efficient assembly processes
• Compliance with environmental regulations including RoHS 3 and REACH for global market acceptance

Professional Applications & Engineering Value

This 5/16"-24 UNF thumb screw combines the strength of 18-8 stainless steel with the ergonomic advantages of a multi-lobe Acetal Plastic head, making it ideal for applications requiring frequent adjustments or tool-free operation. The Class 3A thread fit ensures precise alignment in machinery, electronic enclosures, and industrial equipment where vibration resistance is critical. The fine thread spacing provides superior clamping force in thin materials, while the black Acetal Plastic head offers excellent electrical insulation and chemical resistance. Engineered for temperature resistance from 32° to 180° F, this thumb screw solves common issues of corrosion, slippage, and regulatory compliance in industrial thumb screw applications.

Specification Summary & Compliance

This thumb screw features 5/16"-24 UNF fine threads with Class 3A thread fit for precision tolerance, right-hand thread direction, and fully threaded 1 1/4" length. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and market acceptability for industrial components.