S-90117A722 1/2"-13 x 2 1/2" ASME B18.3 Alloy Steel Wire-Lockable Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (170,000 psi) for reliable performance in high-stress industrial applications
• Superior thread precision with Class 3A fit ensures secure fastening and vibration resistance
• Corrosion-resistant black-oxide finish on alloy steel provides enhanced durability in harsh environments
• Partially threaded design allows for precise clamping force control and simplified assembly
• 3/8" hex drive compatibility enables high-torque installation with standard industrial tools
• Coarse UNC threading facilitates quick assembly and disassembly in demanding conditions
• Rockwell C37 hardness maintains structural integrity under repeated loading cycles

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws deliver critical engineering solutions where high tensile strength and precision threading are paramount. The Class 3A thread fit combined with 1/2"-13 UNC coarse threading provides superior engagement in heavy machinery, automotive assemblies, and industrial equipment where vibration resistance is essential. The partially threaded configuration allows engineers to concentrate clamping force precisely where needed, while the 3/8" hex drive accommodates high-torque applications without stripping. The black-oxide surface treatment extends service life in environments exposed to moisture and chemicals, making these socket head cap screws ideal for manufacturing, construction, and maintenance operations requiring reliable, long-lasting fastening solutions.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and 1/2"-13 UNC coarse threading. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features Rockwell C37 hardness and 170,000 psi tensile strength for guaranteed performance in industrial applications.