S-91251A782 7/16"-20 x 7/8" 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 environments
- Exceptional tensile strength of 170,000 PSI withstands extreme mechanical stresses and heavy loads
- Precision Class 3A thread fit ensures secure fastening with minimal play in critical assemblies
- Fine UNF threading provides superior vibration resistance and improved torque control
- 3/8" hex drive design allows high-torque installation with standard industrial tools
- Full-threaded construction enables maximum engagement depth and uniform load distribution
- Comprehensive compliance with ASTM A574, RoHS 3, and REACH standards guarantees material quality and environmental safety
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver critical performance advantages in high-stress industrial applications where failure is not an option. The combination of 170,000 PSI tensile strength and Rockwell C37 hardness provides exceptional resistance to shear forces and fatigue in machinery, automotive, and aerospace assemblies. The Class 3A UNF fine threads maintain clamping force under severe vibration, while the black-oxide surface treatment protects against corrosion in harsh operating conditions. The 3/8" hex drive accommodates standard torque tools for precise installation in confined spaces, making these fully threaded fasteners ideal for critical joints requiring reliable, long-term performance.
Specification Summary & Compliance
This 7/16"-20 UNF socket head cap screw features precision Class 3A thread fit with fine threading for optimal engagement. Manufactured to ASTM A574 specifications for high-strength alloy steel fasteners, it maintains dimensional accuracy throughout its 7/8" length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across global industrial markets.
