S-90044A290 2-56 x 2 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
- Superior corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications
- Precision Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Optimal hardness rating of Rockwell C37 delivers excellent wear resistance and durability
- Standard hex drive design with 5/64" drive size enables efficient installation and removal with common tools
- Partially threaded configuration offers both secure fastening and clearance flexibility in complex assemblies
- Comprehensive compliance with ASTM A574, RoHS 3, and REACH standards ensures regulatory acceptance
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver exceptional engineering value in precision manufacturing and heavy-duty applications. The 2-56 UNC coarse threads with Class 3A fit provide superior resistance to vibration loosening, making them ideal for machinery, automotive components, and industrial equipment where reliability is critical. The partially threaded design allows for precise clamping force distribution while the 170,000 psi tensile strength ensures structural integrity under extreme loads. The corrosion-resistant black-oxide surface treatment extends service life in harsh environments, reducing maintenance frequency and total cost of ownership for industrial operations requiring inch system fasteners with proven performance credentials.
Specification Summary & Compliance
Manufactured to exacting ASTM A574 specifications, these socket head cap screws feature precision Class 3A thread fit with 2-56 UNC coarse threads and right-hand thread direction. The fasteners maintain dimensional accuracy with 2 1/2" length, 9/64" head diameter, and 5/64" hex drive configuration. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures global acceptance for industrial applications requiring certified components.
