S-97832A283 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 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high-stress conditions.
- Precise and secure fit ensured by the Class 3A thread fit, minimizing the risk of loosening in critical assemblies.
- Enhanced grip and non-slip installation provided by the knurled socket head, allowing for secure tool engagement with a 3/16" hex drive.
- Robust shoulder design with a 3/8" diameter and 1 3/8" length for accurate component alignment and acting as a built-in spacer or pivot.
- Wide industry compatibility through compliance with ASME B18.3 specifications, ensuring interchangeability and reliability.
- Environmentally responsible manufacturing meeting RoHS 3 and REACH standards, making it suitable for regulated global markets.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to solve critical alignment and pivot challenges in demanding applications. Its 5/16"-18 UNC coarse thread with a Class 3A fit provides a secure, vibration-resistant connection, essential for machinery, automotive assemblies, and precision instruments. The knurled socket head with a hex drive ensures positive torque application, preventing cam-out during installation. The integral shoulder acts as a precise datum for locating parts, eliminating the need for additional spacers and reducing assembly time and complexity. Made from corrosion-resistant 18-8 stainless steel, it delivers long-term durability in environments exposed to moisture and chemicals, making it a reliable choice for industrial automation, conveyor systems, and jig and fixture manufacturing.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with a Class 3A fit for high precision. The shoulder diameter is 3/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 1 3/8" with a tolerance of -0.005" to 0.005". It is manufactured in accordance with ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards.
