S-91882A425 1/4"-20 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a 1" diameter knurled round head for superior grip in tool-free applications
• Enhanced durability and corrosion resistance provided by the black-oxide steel finish
• Reliable fastening strength with a 70,000 psi tensile strength and Rockwell B84 hardness for demanding industrial use
• Quick and easy coarse thread engagement with UNC 1/4"-20 threading and Class 2A fit for rapid assembly
• Versatile fully-threaded design ensuring consistent holding power along the entire 3/4" length
• Stable alignment during installation due to the integrated collar (1/2" diameter, 3/8" height)
• Compliance with major environmental regulations including RoHS 3 and REACH for global market suitability

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to solve common industrial challenges where tools are impractical or speed is critical. The knurled round head and coarse UNC 1/4"-20 thread enable rapid, secure hand-tightening in equipment panels, access covers, and frequently adjusted jigs. The raised head profile and integrated collar prevent slipping and provide stable alignment, reducing installation errors. With a 70,000 psi tensile strength and corrosion-resistant finish, it offers reliable performance in manufacturing, electronics, and machinery maintenance, ensuring long-term fastening solutions without compromising on regulatory compliance.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy. It is manufactured from black-oxide steel and is fully threaded along its 3/4" length. The product is compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006), meeting stringent environmental and safety regulations for industrial components.