S-91257A998 1"-14 x 10" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 150,000 PSI tensile strength for critical structural applications
- Superior corrosion resistance through zinc yellow-chromate plating that withstands harsh industrial environments
- Precise thread engagement with Class 2A fit and extra fine threading for vibration-resistant connections
- Optimized torque transmission through external hex drive design and 1 1/2" head width
- Reduced material stress concentration with partial threading along the 10" shank length
- Reliable mechanical performance backed by Grade 8 certification and Rockwell C33 hardness rating
- Simplified inventory management with full compliance to ASME B18.2.1 and international regulatory standards
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in heavy machinery, structural steel connections, and high-vibration equipment where extra fine threading prevents loosening under dynamic loads. The zinc yellow-chromate plating provides superior corrosion protection in manufacturing facilities and outdoor applications, while the partial threading design concentrates clamping force where needed most. Engineered with 150,000 PSI tensile strength and Rockwell C33 hardness, these industrial fasteners maintain integrity in high-stress applications from construction equipment to industrial assembly lines, offering reliable external hex drive compatibility with standard tools for efficient installation.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 specifications meeting SAE J429 Grade 8 requirements with Class 2A thread fit precision. The 1"-14 UNS extra fine thread configuration ensures secure fastening in inch-system applications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, providing 2 1/2" minimum thread length on a 10" overall partially threaded shank with external hex drive functionality.
