S-93985A311 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 416 stainless steel construction, ideal for harsh industrial environments
- Precise alignment and smooth rotation ensured by the precisely machined 3/8" diameter shoulder with tight tolerance control
- High mechanical strength with 120,000 psi tensile strength and Rockwell C26 hardness for reliable load-bearing performance
- Secure installation and removal using the 5/32" hex socket drive, providing excellent torque transmission
- Consistent thread engagement with Class 2A UNC coarse threads for quick assembly and vibration resistance
- Environmental compliance assurance meeting RoHS 3 and REACH standards for safe, regulated industrial use
- Optimized for machinery applications combining a 5/8" shoulder length for component spacing with a 7/16" thread length for secure fastening
Professional Applications & Engineering Value
This precision shoulder screw is engineered to solve critical alignment and durability challenges in industrial machinery. The 416 stainless steel material provides excellent corrosion resistance, while the precisely machined shoulder (3/8" diameter, 5/8" length) ensures components rotate or pivot without misalignment. The UNC coarse threading and Class 2A thread fit enable rapid assembly and maintain integrity under vibration, making it ideal for automated equipment, conveyor systems, and precision instruments. With a hex socket head for secure tool engagement and high tensile strength, it delivers reliable performance in demanding B2B applications where precision and longevity are paramount.
Specification Summary & Compliance
This shoulder screw maintains Class 2A thread fit per UNC standards, with shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002" for precise assembly. Manufactured from 416 stainless steel with Rockwell C26 hardness and 120,000 psi tensile strength, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for industrial fastener applications.
