S-91882A476 1/2"-13 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip with knurled texture on the 1 3/8" diameter head for secure, tool-free tightening and loosening in industrial environments
• Superior corrosion resistance provided by the black-oxide steel finish, extending service life in demanding conditions
• High tensile strength of 70,000 psi ensures reliable fastening under heavy loads and vibration
• Rockwell B84 hardness delivers excellent durability and wear resistance for repeated use
• Class 2A thread fit with UNC coarse threading enables quick assembly and secure holding power
• Fully threaded design allows for maximum adjustment range and consistent clamping force
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to solve critical fastening challenges in industrial maintenance, machinery access panels, and equipment adjustment systems. The knurled head provides exceptional grip even with oily hands or gloves, reducing installation time and eliminating tool dependency. The 1/2"-13 UNC coarse thread offers rapid engagement and superior resistance to vibration loosening, while the 70,000 psi tensile strength ensures structural integrity under dynamic loads. The raised profile and generous 1 3/8" diameter head distribute clamping pressure evenly, preventing surface damage. Ideal for applications requiring frequent access or adjustment, this fully threaded thumb screw delivers reliable performance in manufacturing, automotive, and electronic enclosures where corrosion resistance and quick operation are paramount.

Specification Summary & Compliance

This thumb screw features Class 2A thread fit per UNC standards with 1/2"-13 coarse threading and right-hand direction. Manufacturing complies with RoHS 3 (2015/863/EU) under exemption 6(a)-I for lead as steel alloying element and REACH (EC 1907/2006) compliance as of 01/17/2023. Dimensions include 1 1/2" length, 1 3/8" head diameter, and 7/8" collar diameter, ensuring precision fit for industrial fastening requirements.