S-97345A577 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 for long-lasting performance in harsh industrial environments
- Precise component alignment through 3½" shoulder length with tight tolerances for reliable assembly operations
- High-load carrying capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure installation and removal with 5/32" hex drive socket and knurled head for enhanced grip during torque application
- Consistent thread engagement through Class 3A fit UNC threads ensuring reliable fastening in precision assemblies
- Environmental compliance assurance with RoHS 3 and REACH compliance for global manufacturing requirements
- Industry-standard compatibility meeting ASME B18.3 specifications for reliable interchangeability
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers exceptional engineering value in precision mechanical assemblies where alignment and corrosion resistance are critical. The 3½" precision shoulder provides accurate component positioning in rotating machinery, bearing mounts, and linkage systems, eliminating the need for additional spacers or bushings. The Class 3A thread fit ensures consistent clamping force in UNC threaded applications, while the knurled socket head with hex drive prevents tool slippage during high-torque installations. Manufactured from 316 stainless steel, this fastener maintains structural integrity in corrosive environments including chemical processing, marine applications, and food processing equipment, offering superior performance where standard fasteners would fail prematurely.
Specification Summary & Compliance
This precision shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for superior thread engagement. The shoulder maintains tight dimensional control with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications, this fastener is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental standards for industrial use.
