S-97832A293 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.
- Precise component alignment and pivot points ensured by the long 4 3/4" shoulder with controlled diameter tolerance. li>High-strength fastening with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for demanding applications.
- Reliable, vibration-resistant thread engagement provided by the Class 3A fit and coarse 5/16"-18 UNC thread.
- Secure, non-slip installation and removal facilitated by the hex socket drive and knurled head texture.
- Consistent quality and interchangeability guaranteed by compliance with the rigorous ASME B18.3 standard.
- Safe for use in regulated industries as it is fully compliant with RoHS 3 and REACH environmental directives.
Professional Applications & Engineering Value
This socket head shoulder screw is engineered to solve critical alignment and pivot challenges in machinery and assemblies. The precision-machined shoulder acts as a built-in spacer or bearing surface, eliminating the need for additional components and reducing assembly time. Manufactured from 18-8 Stainless Steel, it provides excellent resistance to rust and corrosion, making it a durable choice for applications exposed to moisture, chemicals, or outdoor elements. The coarse UNC thread and Class 3A fit ensure rapid assembly and a secure, vibration-resistant hold in materials like aluminum and cast iron. The combination of Rockwell B55 hardness and high tensile strength ensures it can withstand significant operational stresses without failing, making it an essential component in automotive, aerospace, and heavy equipment manufacturing.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with a high-precision Class 3A thread fit. The shoulder diameter is held to a tight tolerance of -0.004" to -0.002", and the shoulder length is maintained at 4 3/4" with a tolerance of -0.005" to 0.005". The manufacturing and dimensional specifications conform to ASME B18.3. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.
