S-97832A320 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 industrial environments.
- Precise alignment and reduced wear due to the 5/16" shoulder with tight diameter and length tolerances.
- High mechanical reliability with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
- Secure, high-precision thread engagement provided by the Class 3A UNF fine thread fit.
- Easy installation and removal with a knurled hex socket head for improved grip and torque application.
- Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global supply chain suitability.
Professional Applications & Engineering Value
This stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The precision shoulder with controlled tolerances ensures accurate component positioning, reducing misalignment and wear in machinery, pivots, and assemblies. The Class 3A UNF fine thread offers superior vibration resistance and load distribution, while the 18-8 stainless steel material provides excellent corrosion resistance in moist or chemical environments. The hex socket drive with a knurled head allows for secure tool engagement, facilitating efficient maintenance and assembly in confined spaces. Ideal for use in precision equipment, automotive systems, and robotics where high tensile strength and reliable performance are paramount.
Specification Summary & Compliance
This shoulder screw features a 1/4"-28 UNF fine thread with Class 3A fit for high precision, a shoulder diameter of 5/16" (tolerance: -0.004" to -0.002") and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). It is manufactured to meet ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
