S-91309A587 5/16"-18 x 1 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
- Exceptional 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
- Precise Class 2A thread fit provides smooth assembly and secure fastening in industrial applications
- Durable steel construction with Rockwell B69 hardness offers excellent wear resistance and longevity
- Full threading design allows for maximum engagement and holding power along the entire fastener length
- Standard-compliant manufacturing to ASME B18.2.1 and ASTM A307 ensures consistent quality and interchangeability
- External hex drive design enables easy installation and removal with standard wrenching tools
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw delivers critical engineering value through its steel construction and zinc plating, specifically engineered to combat corrosion in industrial environments. The coarse thread configuration with Class 2A fit ensures rapid assembly and reliable performance in applications where vibration resistance is paramount. With 60,000 PSI tensile strength and full threading, this external hex drive fastener provides superior clamping force for structural connections, machinery assembly, and heavy equipment maintenance. The right-hand thread design follows industry standards, making it ideal for replacement parts and new installations across manufacturing, construction, and industrial maintenance sectors where durability and compliance are non-negotiable.
Specification Summary & Compliance
This hex head screw maintains Class 2A thread fit per UNC standards with precise dimensional accuracy. Manufacturing complies with ASME B18.2.1 specifications and 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 applications while meeting international quality and safety requirements.
