S-91257A992 1"-14 x 7" 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
- Maximum load-bearing capacity with 150,000 psi tensile strength and Grade 8 classification for critical structural applications
- Enhanced corrosion resistance through zinc yellow-chromate plating, extending service life in harsh industrial environments
- Precise thread engagement with Class 2A fit and extra fine 1"-14 threading for superior vibration resistance and joint stability
- Optimized torque transmission via external hex drive and 1 1/2" head width for secure installation with standard tools
- Controlled thread engagement through partial threading design, preventing overtightening in deep applications
- Consistent performance reliability backed by Rockwell C33 hardness and compliance with ASME B18.2.1 manufacturing standards
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for global industrial use
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value where high tensile strength and vibration resistance are critical. The zinc yellow-chromate plated steel construction provides superior protection against corrosion in demanding environments like heavy machinery, structural steel connections, and industrial equipment assembly. The 1"-14 extra fine thread spacing with Class 2A fit ensures precise thread engagement that maintains clamp load under dynamic loading conditions. The 7" length with partial threading allows for optimal stress distribution in thick material applications, while the external hex drive facilitates efficient installation with standard industrial tools. These heavy-duty screws are engineered to prevent joint failure in high-stress applications where reliability is non-negotiable.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit tolerance. Features 1"-14 UNS extra fine threads with right-hand orientation and 2 1/2" minimum thread length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Grade 8 certification ensures 150,000 psi tensile strength and Rockwell C33 hardness standards are consistently met.
