S-91251A432 3/8"-24 x 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
- 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 on alloy steel, extending service life in demanding industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
- 5/16" hex drive design allows for high-torque installation with standard tools, improving assembly efficiency and reducing stripping.
- Partially threaded shank offers optimal grip and alignment, minimizing the risk of cross-threading and ensuring consistent clamping force.
- Fine UNF threads deliver enhanced holding power in materials prone to stripping, ideal for precision engineering components.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chain requirements.
Professional Applications & Engineering Value
Engineered for high-performance industrial fastening, this Black-Oxide Alloy Steel Socket Head Cap Screw addresses common challenges like vibration loosening and material fatigue. The 3/8"-24 UNF fine thread with Class 3A fit ensures minimal backlash in precision machinery, automotive assemblies, and heavy equipment. Its 170,000 PSI tensile strength and Rockwell C37 hardness provide durability against dynamic loads, while the partially threaded design allows for controlled engagement in blind holes or stacked components. The black-oxide surface treatment resists oxidation without compromising dimensional integrity, making it suitable for OEM and MRO applications where reliability and compliance are critical.
Specification Summary & Compliance
This screw features a 3/8"-24 UNF thread with Class 3A precision fit and a minimum thread length of 1-1/4". It meets ASTM A574 specifications for alloy steel socket head cap screws, ensuring consistent mechanical properties. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming adherence to environmental and safety standards for industrial use.
