S-97345A438 10-32 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 industrial environments and chemical exposure
- Precise component alignment ensured by the 1/4" shoulder diameter with tight tolerance control for reliable assembly
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
- Secure, non-slip fastening with knurled socket head and 1/8" hex drive, allowing for firm tool grip and reduced stripping
- Fine thread accuracy with 10-32 UNF Class 3A fit, providing vibration resistance and leak-proof sealing in precision assemblies
- Extended service life due to Rockwell B79 hardness, maintaining thread integrity under repeated use
- Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical alignment and corrosion challenges in precision machinery. The 10-32 UNF fine thread and Class 3A thread fit minimize backlash in assemblies subject to vibration, such as rotating shafts, bearings, and linkages. The knurled socket head enhances grip during installation, reducing the risk of tool slippage in confined spaces. With a 1/4" shoulder diameter manufactured to tight tolerances, it provides an exact pivot or spacer, eliminating misalignment in automated equipment, medical devices, and marine hardware. The corrosion-resistant material ensures longevity in humid, saline, or chemical-rich settings, making it a reliable choice for OEMs and MRO applications where downtime is costly.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for precision UNF threads. Dimensions include a shoulder diameter of 1/4" (tolerance: -0.004" to -0.002") and shoulder length of 11/32" (tolerance: -0.005" to 0.005"). It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory acceptance in industrial markets.
