S-99355A262 10-32 x 1 1/4" ASME B18.3 Tamper-Resistant Asymmetrical-Drive Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Enhanced thread engagement and vibration resistance from the 10-32 UNF fine thread design with Class 2A fit for precise, secure fastening.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications.
• Streamlined installation and aesthetic finish with the rounded button head and U10 asymmetrical drive for efficient torque transfer.
• Full threading for maximum grip length, ensuring consistent holding power across the entire 1-1/4" length.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety.
• Right-hand thread direction for standard, intuitive assembly in standard industrial equipment.

Professional Applications & Engineering Value

This 10-32 UNF fine thread rounded head screw is engineered to address critical challenges in precision assemblies, such as electronics enclosures, machinery panels, and automotive components. The 18-8 Stainless Steel material provides excellent resistance to rust and oxidation, reducing maintenance costs in humid or corrosive settings. Its fine thread and Class 2A thread fit ensure tight tolerances, minimizing the risk of loosening under vibration—common in dynamic industrial environments. The fully threaded design offers uniform clamping force, while the rounded button head and U10 drive facilitate quick, flush installations without snagging. Ideal for B2B users needing reliable, ASME B18.3 compliant fasteners that uphold performance in critical applications.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit for precise dimensional accuracy under the UNF thread type in the inch system. It meets ASME B18.3 manufacturing specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are upheld for industrial use.