S-91236A634 3/8"-16 x 2 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
- Enhanced corrosion resistance with zinc plating for extended service life in demanding 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
- Coarse UNC threading with Class 2A fit offers quick assembly and secure fastening in various materials
- External hex drive design allows for high-torque installation using standard tools
- Partially threaded shank provides optimal grip length while reducing material usage
- Full compliance with ASME B18.2.1 standards guarantees dimensional accuracy and interchangeability
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw delivers exceptional engineering value for industrial fastening applications where reliability is paramount. The steel construction with zinc plating provides superior corrosion protection in manufacturing facilities, machinery assembly, and structural frameworks. The coarse thread design ensures rapid installation in steel, wood, and composite materials, while the partial threading concentrates the clamping force precisely where needed. With its external hex drive and robust head design, this fastener withstands high torque applications without stripping, making it ideal for maintenance, repair, and production operations requiring heavy-duty fastening solutions that meet rigorous industry standards.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with UNC coarse threading (3/8"-16) and meets ASME B18.2.1 dimensional specifications under ASTM A307 material standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. Manufacturing follows strict quality controls for thread accuracy, hardness (Rockwell B69), and tensile strength (60,000 psi) requirements.
