S-8077A341 5/16"-18 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 and reduced maintenance
- Precise alignment and smooth rotation ensured by the 1/2" shoulder diameter with tight tolerance for reliable bearing surfaces
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
- Secure and easy installation using the 1/4" hex drive and knurled head, preventing slippage during torque application
- Accurate and reliable threading with Class 3A UNC coarse threads, ensuring consistent fit and reduced risk of cross-threading
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and environmental safety
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial assembly and precision machinery. The combination of black oxide finish and UNC coarse threads provides excellent corrosion resistance and easy installation in high-vibration environments, reducing downtime. The 1/2" shoulder diameter with precise tolerance offers a stable pivot point for rotating components, minimizing wear in automation equipment, conveyor systems, and fixturing applications. With a 70,000 psi tensile strength, it withstands heavy loads while maintaining alignment integrity, making it ideal for robotic arms and material handling systems where reliability is paramount.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for high precision, a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002"), and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries.
