S-8077A778 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 and black oxide finish, ideal for harsh environments like marine or chemical processing.
- High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance in heavy-duty industrial applications.
- Precise Class 3A thread fit and UNC coarse threading for easy assembly and secure fastening in high-vibration settings.
- Knurled socket head with hex drive provides excellent grip and torque application, reducing slippage during installation.
- Accurate shoulder dimensions (5/8" diameter, 1" length) with tight tolerances for consistent alignment and bearing surfaces in machinery.
- Compliance with ASME B18.3 and environmental standards (RoHS, REACH) guarantees quality and safety for global industrial use.
- Durable Rockwell B79 hardness enhances wear resistance, extending service life in repetitive motion assemblies.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw with a black oxide finish is engineered to address common industrial challenges such as corrosion, misalignment, and mechanical stress. The UNC thread and Class 3A fit ensure quick, secure fastening in equipment like conveyor systems, robotics, and precision instruments, reducing downtime. The knurled socket head allows for efficient torque transfer, while the precise shoulder diameter and length provide stable pivoting and spacing in assemblies. Ideal for heavy-duty applications, it maintains integrity under high loads, supporting sectors from automotive to aerospace with reliable, ASME B18.3-compliant performance.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, with precise dimensions including a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and length of 1" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and reliable use in industrial fastening.
