S-92620A630 3/8"-16 x 1 3/4" 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 tensile strength of 150,000 PSI ensures reliable performance in the most demanding heavy-duty applications
- Superior corrosion resistance provided by zinc yellow-chromate plating extends service life in harsh environments
- Precise Class 2A thread fit guarantees smooth installation and secure fastening with consistent engagement
- Grade 8 certification with Rockwell C33 hardness delivers maximum durability and load-bearing capacity
- Coarse UNC threading enables quick assembly and disassembly while resisting vibration-induced loosening
- External hex drive design provides excellent torque transmission for secure tightening with standard tools
- Full threading along the entire 1 3/4" length offers versatile positioning and maximum grip strength
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions where failure is not an option. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness makes them ideal for structural applications, heavy machinery, and industrial equipment requiring reliable fastener performance. The zinc yellow-chromate plating provides superior protection against corrosion in outdoor or chemically aggressive environments, while the coarse UNC threading ensures rapid assembly in production settings and maintains integrity under constant vibration. Engineered to ASME B18.2.1 specifications, these steel hex bolts offer predictable performance and compatibility with standard components across manufacturing, construction, and automotive industries.
Specification Summary & Compliance
This 3/8"-16 UNC hex head screw features Class 2A thread fit for precise dimensional accuracy and manufacturing consistency. Manufactured to ASME B18.2.1 specifications and meeting SAE J429 Grade 8 requirements for mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries. The external hex drive with 9/16" head width and 1/4" head height provides optimal tool engagement for reliable installation.
