S-91251A314 7/8"-14 x 5" 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 harsh industrial environments
- Exceptional tensile strength of 170,000 PSI ensures reliable performance under extreme mechanical loads
- Precision Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- High-strength alloy steel construction with Rockwell C37 hardness maintains dimensional stability under stress
- Fine UNRF thread profile offers enhanced clamping force and superior resistance to loosening
- 3/4" hex drive design enables high-torque installation without stripping or cam-out issues
- Partially threaded shank allows for precise positioning and concentrated clamping force where needed
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw delivers critical performance advantages for heavy machinery, automotive manufacturing, and industrial equipment applications. The fine 14 UNRF thread pitch combined with Class 3A thread fit ensures precise engagement in high-vibration environments where fastener integrity is paramount. The 170,000 PSI tensile strength and Rockwell C37 hardness provide exceptional resistance to shear and tensile forces, making it ideal for structural connections and high-stress assemblies. The black-oxide surface treatment offers reliable corrosion protection without compromising dimensional accuracy, while the 3/4" hex drive accommodates standard industrial tools for efficient installation and maintenance operations.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNRF fine thread profile. Features include 7/8"-14 thread size, 5" overall length with 2 1/4" minimum thread engagement, and 1 5/16" head diameter. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
