S-8077A322 3/8"-16 ASME B18.3 Shoulder Screws
Shoulder 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 316 stainless steel construction and black oxide finish for extended service life in harsh environments
- Precise alignment and positioning ensured by the 1/2" shoulder with tight diameter tolerance (-0.004" to -0.002")
- High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Reliable thread engagement with Class 3A thread fit and UNC coarse threads for vibration resistance
- Easy installation and removal with hex socket drive and knurled head for improved grip during assembly
- Industry standard compliance meeting ASME B18.3 specifications for consistent performance
- Environmental regulation compliance with RoHS 3 and REACH for safe use in regulated industries
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw provides critical engineering solutions where precise component alignment and high load capacity are required. The 316 stainless steel material offers exceptional resistance to chemicals and moisture, while the black oxide finish enhances corrosion protection in demanding industrial environments. The 1/2" shoulder diameter with tight tolerances ensures accurate positioning in machinery, automation systems, and precision equipment. With Class 3A thread fit and coarse UNC threads, these shoulder screws maintain secure fastening even under vibration and dynamic loads. The combination of 70,000 psi tensile strength and hex socket drive makes them ideal for high-stress applications in manufacturing, robotics, and heavy equipment where reliability is paramount.
Specification Summary & Compliance
This shoulder screw features 3/8"-16 UNC threads with Class 3A thread fit for precision engagement. The shoulder maintains a diameter of 1/2" with tolerance of -0.004" to -0.002" and length of 1/2" with tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications with Rockwell B79 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
