S-91882A475 1/2"-13 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced Grip and Handling: Knurled head texture ensures secure, non-slip operation even with gloves or oily hands, reducing installation time and improving safety.
• Superior Corrosion Resistance: Black-oxide steel finish provides a durable protective layer, extending service life in humid or demanding industrial environments.
• High Tensile Strength: Rated at 70,000 psi tensile strength for reliable performance in high-stress applications, preventing fastener failure.
• Precision Thread Fit: Class 2A thread ensures consistent, easy engagement with standard nuts and tapped holes, minimizing cross-threading risks.
• Robust Material Hardness: Rockwell B84 hardness offers excellent wear resistance, maintaining thread integrity through repeated use.
• Quick Manual Adjustment: Large 1 3/8" knurled head and raised round profile allow for fast tool-free tightening and loosening, ideal for frequent access panels or fixtures.
• Environmental Compliance: Meets RoHS 3 and REACH standards, ensuring safe use in regulated industries without hazardous substances.

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common industrial challenges, such as the need for rapid, tool-free assembly in machinery access panels, electronic enclosures, and jig fixtures. The coarse UNC thread (1/2"-13) and fully threaded design provide strong holding power and quick adjustment in materials where fine threads might strip. The knurled head offers superior grip, reducing slippage and operator fatigue during high-frequency use. With a Rockwell B84 hardness and 70,000 psi tensile strength, it withstands vibrational loads and mechanical stress in automotive, manufacturing, and telecom applications, ensuring long-term reliability without compromising on RoHS and REACH compliance for global supply chain integration.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for precise dimensional accuracy and easy assembly. It is manufactured from high-strength steel with a black-oxide finish and meets RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I and REACH (EC 1907/2006) standards as of January 17, 2023, ensuring environmental safety and regulatory acceptance in industrial markets.