S-99355A259 10-32 x 1" ASME B18.3 Tamper-Resistant Asymmetrical-Drive Stainless Steel Button Head Screws
Tamper-Resistant Asymmetrical-Drive Stainless Steel Button Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Enhanced thread engagement and vibration resistance through UNF fine threading with Class 2A fit for precise assembly
- High mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
- Secure, tamper-resistant fastening with asymmetrical U10 drive design that prevents accidental loosening
- Streamlined installation and reduced head protrusion thanks to the rounded button head profile
- Full thread coverage along the 1" length ensures maximum grip and uniform stress distribution
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 10-32 UNF fine thread screws address critical challenges in machinery assembly, electronics enclosures, and precision equipment. The 18-8 Stainless Steel material provides excellent resistance to rust and chemical exposure, extending service life in moist or corrosive settings. With a fully threaded design and Class 2A thread fit, they ensure consistent clamping force and minimize the risk of vibration-induced failures. The asymmetrical U10 drive offers improved torque transmission and anti-tampering benefits, while the rounded head style reduces snagging and allows for sleek, low-profile installations. Ideal for OEMs and maintenance teams requiring reliable, standards-compliant inch fasteners that uphold operational integrity.
Specification Summary & Compliance
This rounded head screw adheres to ASME B18.3 specifications, with precise UNF fine threads in a 10-32 size and Class 2A tolerance for accurate fit. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. Manufactured to deliver consistent 1" length and 0.4" head diameter, it meets rigorous industrial demands for durability and performance.
