S-97345A543 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 for extended service life in harsh environments
- Precise component alignment through 2" shoulder length with tight tolerances for reliable assembly positioning
- Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure fastening performance with Class 3A thread fit ensuring vibration resistance and consistent clamping force
- Enhanced grip and handling through knurled head texture for easier installation in confined spaces
- Industry-standard compatibility meeting ASME B18.3 specifications for reliable interchangeability
- Environmental compliance with RoHS 3 and REACH regulations for safe use across global markets
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and corrosion resistance are paramount. The 1/4"-28 UNF fine thread with Class 3A fit provides superior vibration resistance in rotating machinery, while the 2" shoulder length with tight diameter tolerances ensures accurate component positioning in assemblies. The hex socket drive combined with knurled head texture facilitates installation in space-constrained industrial equipment. Ideal for precision instruments, automation systems, and marine applications, this fastener maintains structural integrity under 70,000 psi tensile loads while offering exceptional resistance to chemicals and moisture degradation.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit and UNF fine thread specifications. The shoulder diameter maintains -0.004" to -0.002" tolerance with shoulder length tolerance of -0.005" to 0.005". Compliant with ASME B18.3 manufacturing standards and certified for RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material hardness verified at Rockwell B79 with mechanical properties meeting industrial requirements for precision shoulder screw applications.
