S-91251A633 3/8"-16 x 2 1/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
- Hex socket drive design allows for high-torque installation with standard tools, facilitating quick and efficient assembly in confined spaces.
- Partially threaded shank offers optimal grip and alignment in materials, improving load distribution and joint stability.
- Compliance with ASTM A574 guarantees consistent quality and mechanical properties, ensuring reliability for critical engineering projects.
- RoHS 3 and REACH compliance supports environmental and safety standards, making these screws suitable for regulated industries worldwide.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these black-oxide alloy steel socket head cap screws address common challenges like vibration-induced loosening and corrosion in machinery, automotive, and construction applications. The UNC coarse thread and Class 3A fit ensure rapid assembly with minimal cross-threading risks, while the high tensile strength and Rockwell C37 hardness provide durability under dynamic loads. Ideal for use in equipment requiring reliable fastening solutions, they reduce downtime and maintenance costs by offering consistent performance in harsh conditions, backed by ASTM A574 standards for quality assurance.
Specification Summary & Compliance
This screw features a 3/8"-16 UNC thread with Class 3A precision fit and coarse spacing for robust engagement. Manufactured to ASTM A574 specifications, it ensures dimensional accuracy and mechanical reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety requirements for industrial use.
