S-90044A432 3/8"-16 x 2 5/8" ASME B18.3, ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket 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
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing failure risks
- Black-oxide coating on alloy steel provides superior corrosion resistance and durability in harsh industrial environments
- Class 3A thread fit delivers precise, secure fastening with minimal play for vibration-resistant assemblies
- Hex socket drive design allows for high-torque installation in confined spaces, improving assembly efficiency
- Partially threaded shank enables optimal clamping force distribution and prevents thread damage during installation
- Coarse UNRC threads facilitate quick engagement and disassembly, saving maintenance time
- Rockwell C37 hardness maintains structural integrity under heavy loads and repeated use
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw addresses critical engineering challenges in heavy machinery, automotive, and industrial equipment assembly. The combination of 170,000 psi tensile strength and Rockwell C37 hardness ensures reliable performance where vibration resistance and load-bearing capacity are paramount. The 3/8"-16 coarse UNRC threads with Class 3A fit provide secure fastening while accommodating thermal expansion and contraction in metal-to-metal applications. The black-oxide surface treatment extends service life in corrosive environments, making these industrial screws ideal for outdoor equipment, manufacturing fixtures, and precision machinery where durability and dimensional stability are non-negotiable.
Specification Summary & Compliance
This fastener maintains Class 3A thread fit per UNRC standards with 3/8"-16 coarse threads and 2 5/8" length. Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
