S-91251A929 1"-8 x 6 1/2" 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
- Superior tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Black-oxide coating on alloy steel provides enhanced corrosion resistance, extending service life in harsh industrial environments.
- Class 3A thread fit offers precise, tight tolerances for secure fastening and vibration resistance in critical assemblies.
- 3/4" hex drive and standard socket head allow for easy installation and high torque application with common tools.
- Partially threaded design with coarse UNRC threads enables quick assembly and strong holding power in coarse materials.
- Rockwell C37 hardness ensures durability and wear resistance, maintaining integrity under repeated use.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global industrial use.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address common industrial challenges such as corrosion, high load demands, and assembly efficiency. The 1"-8 coarse UNRC thread and Class 3A fit provide excellent grip and vibration resistance in heavy machinery, automotive, and construction applications, reducing maintenance needs. The black-oxide surface treatment enhances corrosion resistance, making it ideal for environments exposed to moisture or chemicals. With a partially threaded rod and 3/4" hex drive, it ensures quick, secure fastening in coarse materials, improving productivity and reliability in industrial screw assemblies.
Specification Summary & Compliance
This screw features a 1"-8 UNRC coarse thread with Class 3A thread fit for precise dimensional accuracy, and a length of 6 1/2". It meets ASTM A574 specifications for high-strength alloy steel fasteners, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
