S-91251A070 1-72 x 5/8" 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 under high-stress conditions, reducing the risk of fastener failure in critical assemblies.
- Precision Class 3A thread fit provides excellent engagement and vibration resistance, maintaining joint integrity in demanding applications.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance and a durable, non-galling surface for extended service life.
- Fine UNF thread spacing allows for finer adjustments and superior clamping force distribution in precision engineering setups.
- Fully threaded design ensures consistent holding power along the entire 5/8" length, ideal for deep or variable material thicknesses.
- Hex socket drive enables high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency, environmental safety, and global regulatory acceptance.
Professional Applications & Engineering Value
This 1-72 UNF Socket Head Cap Screw is engineered to address common industrial challenges such as vibration loosening, corrosion in harsh environments, and the need for precise torque control. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness rating, provides exceptional durability and wear resistance, making it suitable for high-load applications in aerospace, automotive, and precision machinery. The fine thread spacing and Class 3A thread fit ensure tight, secure fastening in components where minimal backlash is critical, while the fully threaded rod type offers versatility in adjusting to various material depths. Its compliance with ASTM A574 standards ensures consistent quality, reducing downtime and maintenance costs in professional settings.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit tolerances for precise engagement, with a UNF fine thread system and right-hand thread direction. It meets ASTM A574 specifications for high-strength alloy steel fasteners and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.
