S-8077A574 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 and black oxide finish, ideal for harsh industrial environments.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable, high-load applications.
- Precise alignment and smooth rotation ensured by the 6" shoulder with tight diameter and length tolerances.
- Secure, high-precision threading with Class 3A UNC coarse threads for easy assembly and vibration resistance.
- Easy installation and removal using a standard 3/16" hex drive and knurled socket head for improved grip.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety.
- Durable and wear-resistant with Rockwell B79 hardness, ensuring long service life in demanding conditions.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The black oxide finish enhances corrosion resistance, making it suitable for moist or chemically aggressive environments. Its 6" shoulder length provides a stable bearing surface for rotating components like gears, pulleys, and linkages, reducing wear and maintaining alignment under dynamic loads. The Class 3A thread fit and UNC coarse threads ensure secure fastening with minimal risk of loosening from vibrations, while the socket head with hex drive allows for efficient installation in confined spaces. Ideal for applications in robotics, conveyor systems, and assembly jigs, this fastener delivers reliable performance where precision and durability are paramount.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for high precision, and a shoulder diameter of 3/8" with tolerances from -0.004" to -0.002". The shoulder length is 6" with a tolerance of -0.005" to 0.005". It complies with ASME B18.3 specifications and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to industry standards and environmental regulations.
