S-91257A892 3/4"-16 x 10" 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 demanding industrial applications
- Superior corrosion resistance provided by zinc yellow-chromate plating in harsh environments
- Reliable thread engagement through Class 2A thread fit and UNF fine threading for secure fastening
- Optimized strength-to-weight ratio with Grade 8 steel construction and Rockwell C33 hardness
- Easy installation and removal with external hex drive and 1 1/8" head width for standard tool compatibility
- Versatile partial threading allowing for both clamping and alignment functions in assembly operations
- Full regulatory compliance meeting ASME B18.2.1, RoHS 3, and REACH standards for global applications
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical performance in heavy machinery, structural steel connections, and industrial equipment where high tensile strength and corrosion resistance are paramount. The 3/4"-16 UNF fine thread configuration provides superior vibration resistance compared to coarse threads, while the zinc yellow-chromate plating creates a protective barrier against oxidation and chemical exposure. The partially threaded design allows the unthreaded shank to bear shear loads efficiently, making it ideal for structural bolting applications requiring precise clamping force. With 10-inch length and external hex drive, these screws accommodate thick material sections while maintaining easy installation access in confined spaces.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 specifications and SAE J429 Grade 8 requirements, this hex head screw features Class 2A thread fit tolerance for consistent engagement. The UNF 3/4"-16 fine thread pattern ensures precise fastening with minimum 2" thread length. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards guarantees safe use across regulated industries, while the 150,000 psi tensile strength and Rockwell C33 hardness verify mechanical performance for critical applications.
