S-8077A767 1/2"-13 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 and marine environments.
- Enhanced durability and wear resistance from the black oxide finish, which also reduces light reflection.
- High-strength performance with 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
- Precise, secure assembly ensured by the Class 3A thread fit and UNC coarse thread for faster installation and reduced cross-threading risk.
- Secure, non-slip grip provided by the knurled head texture, facilitating manual handling and positioning.
- Easy installation and removal with the standard hex socket drive, compatible with common 5/16" hex tools.
- Accurate component alignment due to the precisely machined shoulder with tight diameter and length tolerances.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to solve critical challenges in precision machinery, automation systems, and heavy-duty equipment. The black oxide finish not only enhances corrosion resistance but also minimizes galling and seizing in high-friction applications. The UNC coarse thread and Class 3A fit ensure rapid, reliable assembly while maintaining vibration resistance. The knurled head offers improved grip for manual adjustments, and the robust shoulder diameter provides stable bearing surfaces for rotating parts like pulleys, linkages, and guides. Its compliance with ASME B18.3 guarantees dimensional consistency, making it a trusted choice for OEMs and maintenance teams requiring repeatable, high-performance fastening solutions.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for high precision. The shoulder diameter is 5/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 1 7/8" with a tolerance of -0.005" to 0.005". It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
