S-91309A582 5/16"-18 x 7/8" 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 and structural integrity under heavy loads.
- Rockwell B69 hardness provides excellent durability and resistance to wear and deformation.
- Class 2A coarse UNC thread fit offers faster assembly and reduced risk of cross-threading.
- Full threading along the 7/8" length allows for maximum grip and adjustability in various material thicknesses.
- External hex drive design enables high-torque installation with standard tools for efficient assembly.
- Compliance with ASME B18.2.1 and ASTM A307 guarantees consistent quality and interchangeability for industrial applications.
Professional Applications & Engineering Value
Engineered for robust performance, these 5/16"-18 UNC hex head screws are ideal for heavy-duty industrial assemblies, machinery, and structural frameworks. The high-strength steel construction, combined with a zinc-plated finish, effectively combats corrosion in harsh conditions, reducing maintenance needs. The coarse UNC thread and Class 2A fit ensure quick, secure fastening with minimal effort, enhancing productivity in applications like construction, automotive, and equipment manufacturing. With full threading, they provide consistent clamping force, solving common issues of loosening under vibration and ensuring long-term reliability in critical joints.
Specification Summary & Compliance
This product features precise Class 2A thread fit per UNC standards, with dimensions including a 7/8" length, 1/2" head width, and 5/16"-18 thread size. It complies with ASME B18.2.1 and ASTM A307 manufacturing specifications, ensuring dimensional accuracy and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, supporting safe and sustainable industrial use.
