S-8077A285 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 with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Precise alignment and reduced wear thanks to the 4" shoulder length with tight tolerances for stable component positioning
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure installation and removal featuring a knurled socket head for maximum grip and hex drive compatibility
- Reliable thread engagement with Class 3A fit and coarse 3/8"-16 UNC threads for vibration resistance
- Enhanced durability backed by Rockwell B79 hardness for long-term performance under stress
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in machinery assembly, robotics, and precision equipment. The 4" shoulder length provides a stable bearing surface that minimizes misalignment and reduces wear on moving parts, while the Class 3A thread fit ensures secure fastening in high-vibration environments. The coarse UNC threads facilitate quick installation and resist loosening, making it ideal for industrial applications requiring repeated adjustments. Combined with its high tensile and shear strength, this shoulder screw delivers reliable performance in corrosive conditions, extending service life and reducing maintenance costs.
Specification Summary & Compliance
This shoulder screw features precise dimensions including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". It adheres to ASME B18.3 specifications for dimensional accuracy and Class 3A thread fit for superior thread engagement. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.
