S-91274A436 1/2"-13 x 3/4" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws
Alloy Steel Socket 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 tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications
- Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh environments
- Precise Class 3A thread fit delivers secure fastening with minimal vibration loosening
- Rockwell C37 hardness maintains structural integrity under heavy loads and repeated use
- Hex socket drive design allows for high torque application and easy installation in confined spaces
- Coarse UNC threading enables quick assembly and disassembly while resisting cross-threading
- Full compliance with industry standards including ASME B18.3 and ASTM A574 for guaranteed quality
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these socket head cap screws combine zinc-flake-coated alloy steel construction with UNC coarse threading to solve critical fastening challenges. The 1/2"-13 thread size with Class 3A fit provides superior vibration resistance in heavy machinery, automotive assemblies, and structural applications where loosening could cause catastrophic failure. The hex drive socket head design enables high-torque installation in space-constrained applications, while the corrosion-resistant coating ensures long-term reliability in outdoor or chemically aggressive environments. These industrial fasteners deliver consistent performance where precision, strength, and durability are non-negotiable requirements.
Specification Summary & Compliance
This socket head cap screw features precise Class 3A thread fit according to UNC standards with 3/4" length and 1/2"-13 coarse threading. Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, ensuring dimensional accuracy and mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, with corrosion resistance verified per ASTM B117 testing standards.
