S-8077A328 3/8"-16 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 from 316 stainless steel with black oxide finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
- Precision Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
- Knurled socket head design provides enhanced grip and prevents tool slippage during installation
- Accurate shoulder positioning with controlled diameter and length tolerances for precise component alignment
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for quality assurance
- Coarse UNC thread spacing enables quick assembly and disassembly in maintenance operations
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish delivers critical performance advantages in demanding industrial applications. The combination of high-strength material and protective coating provides exceptional resistance to corrosion, chemicals, and extreme temperatures, making it ideal for machinery, automotive, and marine environments. The precision Class 3A thread fit and controlled shoulder dimensions ensure accurate component alignment while preventing misalignment and reducing wear in rotating assemblies. The knurled socket head with hex drive allows for secure tool engagement, minimizing stripping and enabling reliable torque application in confined spaces. These shoulder screws serve as excellent pivots, axles, and spacers in mechanical systems where dimensional stability and corrosion resistance are paramount.
Specification Summary & Compliance
This precision shoulder screw features 3/8"-16 UNC coarse threads with Class 3A fit for superior thread engagement. Critical dimensions include a 1/2" shoulder diameter (-0.004" to -0.002" tolerance) and 7/8" shoulder length (-0.005" to 0.005" tolerance) for precise component positioning. Manufactured to ASME B18.3 specifications with Rockwell B79 hardness, this fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
