S-97832A328 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
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under high stress
- Precise alignment and secure positioning due to the 1-3/4" shoulder with controlled tolerances, minimizing assembly play
- Easy installation and removal with a 5/32" hex socket drive and knurled head for improved grip and torque application
- Fine thread reliability with Class 3A fit and 1/4"-28 UNF thread, providing vibration resistance and secure fastening
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety
- Durable and wear-resistant with Rockwell B55 hardness, maintaining integrity through repeated use
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision equipment. The 1-3/4" shoulder length with tight diameter and length tolerances ensures exact component spacing and reduces misalignment, while the Class 3A UNF fine thread enhances vibration resistance in dynamic applications. The knurled socket head and hex drive facilitate quick assembly in confined spaces, and the corrosion-resistant material minimizes downtime in humid or chemical-exposed environments. Ideal for use in pivots, rotating shafts, and jig fixtures, this shoulder screw delivers long-term reliability and performance consistency.
Specification Summary & Compliance
This shoulder screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for precision engagement. The shoulder diameter is 5/16" with a tolerance of -0.004" to -0.002", and the shoulder length is 1-3/4" with a tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety standards.
