S-91251A043 3/4"-16 x 1 3/4" 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 in high-stress applications, reducing the risk of fastener failure.
- Corrosion-resistant black-oxide finish on alloy steel enhances durability and longevity in harsh industrial environments.
- Precision Class 3A thread fit provides superior engagement and vibration resistance for secure, long-lasting assemblies.
- Fine UNRF threads offer improved adjustment control and higher fatigue strength compared to coarse threads.
- 5/8" hex drive socket head allows for high-torque installation with standard tools, minimizing stripping and improving efficiency.
- Full threading along the 1 3/4" length ensures maximum grip and flexibility in various material thicknesses.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chain use.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy machinery, automotive, and construction assemblies. The fine UNRF thread (3/4"-16) and Class 3A fit deliver exceptional clamp load retention and resistance to loosening under dynamic loads. Its high tensile strength (170,000 psi) and Rockwell C37 hardness make it ideal for high-pressure joints, while the black-oxide surface treatment provides reliable corrosion protection without compromising dimensional integrity. By integrating this fully threaded inch fastener, engineers achieve robust, maintenance-free connections in demanding environments, enhancing overall equipment reliability and reducing lifecycle costs.
Specification Summary & Compliance
This socket head cap screw features a 3/4"-16 UNRF fine thread with Class 3A tolerance, ensuring precise fit and high fatigue resistance. It is manufactured in accordance with ASTM A574 specifications for high-strength alloy steel socket head cap screws. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.
