S-90282A245 1/2"-13 x 2 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with a 1 1/4" diameter knurled thumb head for easy manual tightening without tools
• Reduced surface damage and secure fastening thanks to the permanent swivel tip that accommodates up to 7.5° angular misalignment
• Superior corrosion resistance and durability with black-oxide steel construction offering Rockwell B85 hardness
• High load-bearing capability supported by an 80,000 psi tensile strength for demanding industrial environments
• Reliable and quick installation with fully threaded Class 2A UNC coarse threads ensuring consistent fit and easy assembly
• Space-efficient low-profile round head design ideal for applications with limited clearance
• Compliance with international safety standards including RoHS 3 and REACH for safe use in regulated industries

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common industrial challenges such as frequent adjustments, misaligned components, and corrosive environments. The permanent swivel tip with a 7.5° maximum angle compensates for minor misalignments, preventing cross-threading and reducing wear on mating surfaces. Its knurled thumb head provides exceptional manual grip, enabling quick assembly and disassembly in tight spaces without specialized tools. Made from robust steel with black-oxide coating, it resists rust and wear, making it suitable for machinery, electronics, and automotive applications where high tensile strength (80,000 psi) and Class 2A UNC coarse threads ensure reliable performance under vibration and heavy loads.

Specification Summary & Compliance

This thumb screw features precise Class 2A thread fit with UNC coarse threads (1/2"-13), ensuring dimensional accuracy and easy engagement. It is fully threaded with a length of 2 1/2" and a right-hand thread direction. The product complies with RoHS 3 (2015/863/EU) under exemption 6(a)-I for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial use.