S-97345A583 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 industrial environments and chemical exposure
- Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing applications
- Precise alignment and spacing ensured by the 1" shoulder with tight diameter and length tolerances for consistent assembly fit
- High-reliability threading with Class 3A UNC coarse thread providing secure fastening and vibration resistance
- Easy installation and removal using the 5/32" hex socket drive and knurled head for improved grip during tool operation
- Regulatory compliance assurance meeting ASME B18.3 standards and RoHS/REACH environmental directives for global supply chain compatibility
- Durable performance with Rockwell B79 hardness maintaining thread integrity and shoulder surface under repeated use
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"-20 UNC Class 3A thread with coarse pitch ensures rapid assembly while maintaining vibration resistance in dynamic equipment. The 1" shoulder length with controlled tolerances provides accurate component spacing in rotating assemblies, jigs, and machinery guides. Socket head design with knurling facilitates secure tool engagement in confined spaces, while the 70,000 psi tensile strength supports heavy-duty applications in marine, chemical processing, and food equipment where stainless steel shoulder bolts prevent contamination and withstand corrosive media.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and UNC coarse threading. Shoulder diameter tolerance maintained at -0.004" to -0.002" with length tolerance of -0.005" to 0.005". Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification confirms 316 stainless steel composition for corrosion resistance applications.
