S-90044A159 3/8"-24 x 2 1/2" 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
- Superior tensile strength of 170,000 psi ensures reliable performance under extreme mechanical loads, reducing the risk of fastener failure in critical applications.
- Exceptional hardness at Rockwell C37 provides excellent wear resistance and durability, extending service life in high-stress environments.
- Precision Class 3A thread fit guarantees tight, secure fastening with minimal backlash, ideal for applications requiring exact alignment and vibration resistance.
- Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance, protecting against rust and environmental degradation in industrial settings.
- Fine UNRF threads deliver improved clamping force and better load distribution compared to coarse threads, enhancing joint integrity.
- Hex socket drive design with 5/16" drive size allows for high-torque installation and removal, facilitating efficient assembly in confined spaces.
- Full threading along the 2 1/2" length provides maximum grip and adjustability, ensuring consistent holding power across the entire fastener.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these socket head cap screws combine black-oxide alloy steel construction with UNRF fine threads to address common engineering challenges such as vibration loosening and corrosion-induced failure. The Class 3A thread fit ensures precise engagement in machinery, automotive assemblies, and precision equipment, where tolerance control is critical. The hex drive design enables secure installation in tight spaces, reducing assembly time while maintaining high tensile strength. Ideal for heavy-duty applications requiring reliable, long-lasting fasteners that withstand harsh conditions without compromising performance.
Specification Summary & Compliance
This screw meets ASTM A574 specifications, ensuring consistent quality and performance. Threads conform to UNRF fine thread standards with a Class 3A fit for high precision. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally sensitive and regulated industries.
