S-90058A829 10-32 x 1/2" Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments.
• Superior thread engagement and vibration resistance due to Class 3A thread fit and UNF fine threads, ensuring reliable, long-term fastening integrity.
• High tensile strength of 80,000 psi provides exceptional load-bearing capacity for demanding mechanical assemblies.
• Optimized drive performance with the Tri-Groove drive style, reducing cam-out and enabling efficient installation with high torque transfer.
• Consistent Rockwell C28 hardness offers excellent durability and resistance to wear and deformation under stress.
• Fully threaded 1/2" length design allows for maximum grip and adjustability across the entire fastener length.
• Rounded head profile ensures a smooth, finished appearance and reduces the risk of snagging or injury in assembled products.

Professional Applications & Engineering Value

Engineered for precision and reliability, these 10-32 UNF zinc-plated steel rounded head screws address critical challenges in industrial fastening, such as loosening under vibration and corrosion in exposed settings. The Class 3A thread fit and fine UNF threading deliver tight tolerances, minimizing backlash and enhancing joint stability in machinery, automotive components, and electronic enclosures. The Tri-Groove drive facilitates quick, secure installation with reduced tool slippage, boosting assembly line efficiency. Combined with a high rounded head profile, these screws provide a flush finish ideal for applications where aesthetics and safety are paramount, ensuring dependable performance in heavy-duty and precision engineering projects.

Specification Summary & Compliance

This screw adheres to UNF thread standards with a Class 3A thread fit for precise dimensional accuracy. It features a right-hand thread direction, fully threaded 1/2" length, and is manufactured from zinc-plated steel, compliant with industry regulations such as RoHS and REACH for environmental safety. The design meets common engineering specifications for tensile strength and hardness, supporting use in assemblies requiring high reliability.