S-92620A565 1/4"-28 x 7/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex 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
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Precision thread engagement with Class 2A UNF fine threads ensuring secure fastening and vibration resistance
- Maximum hardness durability at Rockwell C33 for reduced wear and deformation under heavy loads
- Full-threaded design providing consistent clamping force along the entire 7/8" length
- Industry-standard compliance with ASME B18.2.1 and SAE J429 specifications for guaranteed interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance, meeting modern regulatory requirements
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance where failure is not an option. The UNF fine thread configuration provides superior resistance to loosening under vibration, making them ideal for machinery, automotive assemblies, and industrial equipment subjected to dynamic loads. The zinc yellow-chromate plating creates a robust barrier against corrosion, significantly extending maintenance intervals in humid or chemically aggressive environments. With their external hex drive and fully threaded design, these fasteners offer excellent torque transmission and uniform stress distribution, preventing joint failure in heavy-duty applications requiring precise clamping force and long-term reliability.
Specification Summary & Compliance
Manufactured to exacting ASME B18.2.1 and SAE J429 standards, these hex head screws feature Class 2A thread fit tolerances for consistent mating with corresponding nuts and tapped holes. The 1/4"-28 UNF fine thread configuration ensures precise engagement in critical assemblies. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility, while the Grade 8 classification guarantees mechanical properties including 150,000 psi tensile strength and Rockwell C33 hardness for demanding industrial applications.
