S-8077A782 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, ideal for harsh industrial environments and chemical exposure
- Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance under heavy use
- High tensile strength of 70,000 psi ensures reliable load-bearing capacity for demanding mechanical applications
- Precise Class 3A thread fit with 3/8"-16 UNC coarse threads for secure, vibration-resistant fastening
- Knurled socket head design offers improved grip and easier installation with standard 5/16" hex tools
- Accurate shoulder dimensions with tight tolerances for consistent alignment in assemblies and rotating parts
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global supply chains
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in industrial machinery, automation, and precision equipment. The 3/8"-16 UNC coarse threads and Class 3A thread fit provide excellent resistance to loosening under vibration, making it ideal for high-stress applications like conveyor systems, robotic arms, and motor mounts. The 1-1/2" shoulder length and precise diameter tolerances ensure smooth rotation and alignment in bushings, bearings, and linkages, reducing wear and maintenance downtime. With a Rockwell B79 hardness and 70,000 psi tensile strength, it delivers reliable performance in corrosive or high-temperature environments, supporting long-term operational efficiency in sectors such as aerospace, marine, and chemical processing.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC thread with Class 3A fit for high precision, a shoulder diameter of 5/8" with tolerance of -0.004" to -0.002", and shoulder length of 1-1/2" with tolerance of -0.005" to 0.005". It meets ASME B18.3 manufacturing specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
