S-91273A636 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 and black oxide finish, ideal for harsh industrial environments.
- Enhanced installation security thanks to the knurled socket head and 3/16" hex drive, preventing tool slippage.
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for demanding applications.
- Precise alignment and smooth rotation ensured by the 2 1/4" shoulder with standard fit and tight tolerances.
- Reliable thread engagement with Class 2A fit and coarse 3/8"-16 UNC thread for quick assembly and vibration resistance.
- Durable performance backed by Rockwell B55 hardness, resisting wear and deformation under load.
- Compliance with global standards including RoHS 3 and REACH, ensuring safe and sustainable use.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical challenges in machinery assembly, pivoting mechanisms, and precision equipment. The black oxide finish enhances corrosion resistance, extending service life in moist or chemically aggressive settings. Its 3/8"-16 UNC coarse thread and Class 2A fit provide secure fastening with reduced cross-threading risks, while the 2 1/4" shoulder length offers stable bearing surfaces for rotating parts like gears and pulleys. The knurled socket head with hex drive ensures torque-resistant installation, minimizing downtime in automotive, aerospace, and industrial automation applications where reliability and precision are paramount.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise assembly. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances and suitable for global industrial use.
