S-91309A711 1/2"-13 x 7/8" ASME B18.2.1, SAE J429 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 that protects against rust and extends service life in harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and prevents fastener failure
- Rockwell B69 hardness provides excellent durability and resistance to wear during repeated assembly and disassembly
- Coarse UNC threads with Class 2A fit enable faster installation and better vibration resistance in demanding applications
- External hex drive design allows for high torque application with standard tools, reducing installation time
- Full threading along the 7/8" length maximizes grip strength and distributes load evenly across the entire fastener
- Compliance with multiple industry standards including ASME B18.2.1 and SAE J429 guarantees consistent quality and interchangeability
Professional Applications & Engineering Value
These 1/2"-13 UNC hex head screws deliver exceptional engineering value in heavy machinery, structural steel connections, and industrial equipment assembly. The zinc plated steel construction provides critical corrosion protection in environments exposed to moisture and chemicals, while the coarse thread design prevents cross-threading and maintains clamping force under vibration. With 60,000 psi tensile strength and Rockwell B69 hardness, these fasteners solve common industrial challenges of joint integrity and long-term reliability. The external hex drive accommodates high torque requirements in confined spaces, making them ideal for construction, manufacturing, and maintenance applications where strength and durability are paramount.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 1/2"-13 UNC coarse threads and right-hand threading direction. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety and restricted substances.
