S-91251A048 3/4"-16 x 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 under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
- Fine thread spacing (UNRF) enhances holding power and distributes load more evenly, improving joint integrity.
- Partially threaded design allows for controlled clamping force and easier alignment in assemblies.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- 5/8" hex drive compatibility enables efficient installation with standard tools, speeding up assembly processes.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these Black-Oxide Alloy Steel Socket Head Cap Screws address common challenges like vibration loosening and corrosion. The UNRF fine thread design ensures superior grip in materials prone to stress cracking, while the Class 3A thread fit minimizes backlash in precision machinery. Ideal for heavy-duty equipment, automotive assemblies, and structural frameworks, the 170,000 PSI tensile strength and Rockwell C37 hardness provide durability under dynamic loads. The black-oxide surface treatment adds a protective layer against moisture and chemicals, extending component life without sacrificing installation efficiency with a standard 5/8" hex drive.
Specification Summary & Compliance
This screw adheres to ASTM A574 specifications, ensuring consistent quality and performance. Threads meet Class 3A dimensional tolerances for precise fit, with UNRF fine thread spacing at 3/4"-16 size. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global markets.
