S-97832A327 1/4"-28 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 environments and reducing replacement frequency.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress.
- Precise Class 3A thread fit guarantees tight, secure fastening with minimal risk of loosening in critical assemblies.
- Knurled socket head with hex drive provides excellent grip and torque application, preventing tool slippage during installation.
- 1-1/2" shoulder length with controlled tolerances allows for accurate component alignment and smooth rotational movement.
- Fine UNF thread (1/4"-28) offers enhanced holding power and vibration resistance in precision applications.
- Full compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion-induced failure, and assembly inefficiency. The 18-8 stainless steel material provides excellent resistance to rust and oxidation, making it suitable for applications in machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The 1-1/2" shoulder length with tight tolerances ensures precise positioning of moving parts, reducing wear and maintenance costs. Combined with a Class 3A thread fit and knurled socket head, it delivers secure, repeatable fastening that withstands vibrations and high-stress conditions, enhancing overall equipment reliability and lifespan.
Specification Summary & Compliance
This shoulder screw features a 1/4"-28 UNF fine thread with Class 3A fit for high precision, and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005". It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability.
