S-8077A416 10-32 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 from 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
- Exceptional thread precision with Class 3A fit for reliable, vibration-resistant assemblies and reduced risk of cross-threading.
- Enhanced durability and wear resistance provided by the black oxide finish, which also minimizes light reflection.
- High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications.
- Secure, non-slip installation thanks to the knurled socket head and hex drive, allowing for high torque application.
- Precise component alignment enabled by the consistent 1/4" shoulder diameter and controlled shoulder length tolerances.
- Global compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical alignment and corrosion challenges in precision assemblies. The Class 3A UNF fine thread ensures tight, secure fastening in applications susceptible to vibration, such as robotics, aerospace linkages, and conveyor systems. The black oxide finish on the socket head shoulder screw enhances corrosion resistance while providing a low-glare surface, essential for optical and medical equipment. With a Rockwell B79 hardness and high tensile strength, it maintains dimensional stability under load, preventing joint failure in automated machinery and precision instruments. The knurled head offers improved grip during installation, reducing tool slippage and assembly time in high-volume production environments.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, featuring a 10-32 UNF thread with Class 3A fit for precise engagement. Dimensional tolerances include a shoulder diameter of 1/4" (tolerance: -0.004" to -0.002") and shoulder length of 15/16" (tolerance: -0.005" to 0.005") to ensure consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing the absence of hazardous substances for safe use in global markets.
