S-91273A162 1/4"-20 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 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
- Precise component alignment ensured by the 3 1/2" shoulder with tight ±0.005" length tolerance for reliable assembly fit
- High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear resistance for demanding applications
- Secure installation and removal with 1/8" hex drive socket head and knurled texture for enhanced grip
- Consistent thread engagement through Class 2A UNC coarse threads that resist loosening under vibration
- Environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industries
- Optimized durability with Rockwell B55 hardness providing excellent wear resistance
Professional Applications & Engineering Value
This socket head shoulder screw delivers critical engineering value in precision assemblies where component alignment and rotational movement are paramount. The 3 1/2" shoulder length with tight manufacturing tolerances provides an exact bearing surface for gears, pulleys, and linkages, eliminating the need for additional spacing components. Manufactured from 18-8 stainless steel, it offers exceptional corrosion resistance while maintaining 70,000 psi tensile strength in demanding environments. The 1/4"-20 UNC coarse threads with Class 2A fit ensure reliable fastening in machinery, automotive, and industrial equipment applications. The combination of hex drive socket head with knurled texture facilitates secure installation in confined spaces, making it ideal for precision manufacturing and maintenance operations.
Specification Summary & Compliance
This shoulder screw features 1/4"-20 UNC coarse threads with Class 2A thread fit for standard industrial applications. The 3 1/2" shoulder length maintains ±0.005" tolerance with shoulder diameter tolerance of -0.004" to -0.002". Manufactured to industry standards using 18-8 stainless steel with Rockwell B55 hardness, the screw complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions.
