S-97345A535 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, ideal for harsh chemical and marine environments
- Enhanced load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Precise alignment and reduced wear thanks to Class 3A thread fit and fine UNF threading for vibration resistance
- Secure, non-slip installation with knurled socket head and 5/32" hex drive for reliable torque application
- Extended service life with Rockwell B79 hardness and controlled shoulder tolerances for consistent performance
- Regulatory compliance assurance meeting ASME B18.3 standards and RoHS 3/REACH environmental directives
- Versatile mounting solutions with 1-3/4" shoulder length providing stable pivot points in machinery assemblies
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical engineering advantages in precision industrial applications. The Class 3A thread fit with 1/4"-28 UNF fine threading ensures vibration-resistant fastening in dynamic equipment, while the knurled socket head prevents tool slippage during high-torque installation. The extended 1-3/4" shoulder length provides accurate component spacing in rotating assemblies, reducing wear and maintaining alignment in conveyor systems, robotics, and automated machinery. With exceptional corrosion resistance from 316 stainless steel, these shoulder screws maintain integrity in chemical processing, marine, and food processing equipment where environmental factors degrade inferior fasteners.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNF fine thread profile. Shoulder diameter maintains -0.004" to -0.002" tolerance with shoulder length controlled within -0.005" to 0.005" tolerance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications.
