S-97345A685 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 chemical or marine environments.
- Exceptional mechanical strength with 70,000 PSI tensile and 35,000 PSI shear strength for reliable performance under high stress.
- Precise alignment and reduced wear provided by the 3 1/2" shoulder with tight diameter and length tolerances.
- Secure, high-torque installation enabled by the Class 3A thread fit and 3/16" hex socket drive.
- Enhanced grip and handling from the knurled head texture, preventing slippage during manual assembly.
- Broad industry compliance meeting ASME B18.3 standards and environmental regulations like RoHS 3 and REACH.
- Versatile coarse UNC threading for quick assembly and disassembly in various industrial applications.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The 5/16"-18 UNC thread with Class 3A fit ensures secure fastening with minimal backlash, while the long, accurately machined shoulder acts as a pivot, spacer, or bearing surface, reducing component wear and simplifying assembly. The hex socket drive and knurled head provide excellent torque transmission and handling in confined spaces. Ideal for use in robotics, conveyor systems, and packaging machinery, this screw offers reliable performance in corrosive or high-load environments, backed by its high tensile and shear strength.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC coarse thread with Class 3A precision tolerance. The shoulder diameter is 3/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 3 1/2" with a tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 specifications, it is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and material reliability for industrial use.
