S-97345A553 1/4"-20 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 chemical and marine environments
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear ratings for heavy-duty applications
- Precision thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance
- Secure installation and removal with 5/32" hex socket drive and knurled head for enhanced grip
- Accurate component alignment with 2 1/4" shoulder length maintaining precise positioning
- Industry-standard compliance meeting ASME B18.3 specifications for guaranteed interchangeability
- Environmental regulation adherence with RoHS 3 and REACH compliance for global supply chain compatibility
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 316 stainless steel shoulder screws provide critical solutions where corrosion resistance and mechanical reliability are paramount. The 1/4"-20 UNC coarse thread with Class 3A fit delivers superior vibration resistance in machinery, automation systems, and precision equipment. The 2 1/4" shoulder length acts as a precision axle or pivot point in assemblies, while the knurled head and hex socket drive facilitate secure installation in confined spaces. Particularly valuable in chemical processing, marine equipment, and food machinery where corrosion resistance and regulatory compliance are essential for operational safety and longevity.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with UNC coarse threading and maintains tight shoulder diameter tolerance of -0.004" to -0.002". Manufactured to ASME B18.3 specifications ensuring dimensional consistency and interchangeability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances. Mechanical properties include Rockwell B79 hardness and verified 70,000 psi tensile strength for guaranteed performance in critical applications.
