S-97345A510 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 316 stainless steel construction, ideal for harsh environments and chemical exposure
- Precise component alignment ensured by the consistent shoulder diameter and length with tight manufacturing tolerances
- High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for demanding mechanical applications
- Secure, non-slip fastening with the knurled socket head and hex drive for reliable torque transmission
- Fine thread engagement with 1/4"-28 UNF Class 3A fit providing vibration resistance and superior clamping force
- Long-term durability backed by Rockwell B79 hardness for excellent wear resistance and extended service life
- Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This precision shoulder screw is engineered to solve critical alignment and durability challenges in industrial assemblies. The 316 stainless steel material offers exceptional resistance to corrosion and oxidation, making it ideal for marine, chemical processing, and food-grade equipment. The knurled socket head with hex drive ensures secure tool engagement, preventing cam-out during high-torque installation. The UNF fine thread and Class 3A fit provide superior vibration resistance in dynamic applications like robotics, conveyor systems, and precision machinery, where maintaining alignment of rotating parts is essential. The integrated shoulder acts as a precise pivot or axle, eliminating the need for additional spacers and reducing assembly complexity.
Specification Summary & Compliance
This shoulder screw features a 1/4"-28 UNF fine thread with Class 3A fit for high-precision engagement. The shoulder diameter is 5/16" with a tolerance of -0.004" to -0.002", and shoulder length is 1/2" with a tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 specifications, it is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental and safety standards are met for industrial use.
