S-91251A923 1/4"-20 x 7 1/2" 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
- Corrosion-resistant black-oxide finish on alloy steel provides enhanced durability and protection against rust in harsh industrial environments.
- Precise Class 3A thread fit offers superior engagement and vibration resistance, maintaining secure connections in machinery and equipment.
- Hex socket drive design allows for easy installation and removal with standard tools, minimizing assembly time and improving workflow efficiency.
- Partially threaded shank enables optimal clamping force distribution, ideal for applications requiring precise joint control and stability.
- Compliance with ASTM A574, RoHS 3, and REACH standards guarantees material quality and environmental safety, meeting rigorous industrial and regulatory requirements.
- Coarse UNC threading facilitates quick assembly and reduces cross-threading risks, enhancing productivity in high-volume operations.
Professional Applications & Engineering Value
Engineered for high-strength fastening in critical industrial settings, this black-oxide alloy steel socket head cap screw addresses common challenges like vibration loosening and corrosion. The 1/4"-20 UNC coarse thread and Class 3A fit ensure tight, reliable connections in machinery, automotive assemblies, and heavy equipment, where partially threaded designs prevent over-torquing and distribute load evenly. With a Rockwell C37 hardness and robust ASTM A574 compliance, it withstands extreme forces and environmental exposure, reducing maintenance needs and downtime in sectors like manufacturing, construction, and aerospace.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 3A fit for precise dimensional accuracy and coarse spacing, meeting ASTM A574 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety guidelines for industrial use.
