S-91236A638 3/8"-16 x 3 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength 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
- Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B69 hardness provides excellent durability and resistance to wear during installation and use
- External hex drive design allows for easy installation with standard tools and high torque application
- Class 2A thread fit offers consistent assembly with standard nuts while maintaining smooth engagement
- Partially threaded shank provides optimal clamping force distribution for secure joint connections
- Compliance with multiple international standards including ASME B18.2.1, RoHS 3, and REACH for global project acceptance
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw delivers exceptional engineering value through its steel construction and zinc plating, specifically designed to address common industrial fastening challenges. The coarse thread configuration ensures rapid installation in various materials while resisting vibration-induced loosening. The external hex drive provides superior torque transmission for high-clamp force applications in machinery assembly, structural steel connections, and heavy equipment manufacturing. The partially threaded design concentrates clamping force precisely where needed, preventing joint failure in dynamic load conditions. These industrial hex bolts are engineered to maintain integrity in demanding environments where corrosion resistance and mechanical strength are critical for operational safety and longevity.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit per UNC standards, ensuring consistent dimensional accuracy and proper engagement. Manufactured to ASME B18.2.1 specifications with material compliance to ASTM A307. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for international industrial applications. Thread specifications include 3/8"-16 UNC coarse thread with right-hand direction and minimum 1" thread length on a 3 1/2" overall length partially threaded shank.
