S-90324A160 3/8"-16 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, ideal for harsh industrial environments
- Exceptional thread engagement through Class 3A fit left-hand UNC threads for reliable reverse-threading applications
- High mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for demanding loads
- Precision shoulder alignment with controlled diameter and length tolerances for accurate component positioning
- Secure installation using 1/4" hex drive and knurled head for non-slip tool engagement
- Compliance assurance with RoHS 3 and REACH regulations for environmental and safety standards
- Optimized durability with Rockwell B55 hardness maintaining performance under repeated use
Professional Applications & Engineering Value
This left-hand thread shoulder screw addresses critical reverse-threading requirements in precision assembly systems where standard right-hand threads would loosen under rotational forces. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery exposed to moisture, chemicals, or outdoor elements. With its Class 3A thread fit and precisely controlled shoulder dimensions, this component ensures accurate alignment of moving parts in jigs, fixtures, and rotating assemblies. The coarse UNC threading offers rapid installation while the 1" shoulder length and 1/2" shoulder diameter provide stable bearing surfaces for pivoting components. These features make it particularly valuable in automation equipment, textile machinery, and precision instruments where reverse-motion prevention and dimensional stability are critical.
Specification Summary & Compliance
This shoulder screw maintains Class 3A thread fit per UNC standards with precise shoulder diameter tolerance (-0.004" to -0.002") and shoulder length tolerance (-0.005" to 0.005"). Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance compliance for industrial applications worldwide.
