S-8077A626 5/16"-18 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
- Exceptional corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments.
- Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance under stress.
- Precise assembly and alignment ensured by the Class 3A thread fit and standard shoulder fit, reducing installation errors.
- Enhanced grip and torque application from the knurled socket head and hex drive, minimizing slippage during tightening.
- Durable and wear-resistant construction with Rockwell B79 hardness, extending service life in repetitive use.
- Broad compatibility with UNC coarse threads and right-hand direction, suitable for standard industrial equipment.
- Regulatory peace of mind through compliance with ASME B18.3, RoHS 3, and REACH, meeting global safety standards.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common industrial challenges, such as misalignment and corrosion-induced failures. The black oxide finish enhances its resistance to moisture and chemicals, making it ideal for applications in machinery, automotive assemblies, and marine equipment. Its Class 3A thread fit and precise shoulder dimensions ensure secure fastening in rotating parts or pivoting mechanisms, reducing vibration loosening. The knurled socket head with a hex drive allows for easy installation in confined spaces, while the high tensile and shear strengths support heavy-duty operations. By integrating UNC coarse threads and compliance with ASME B18.3, it delivers reliability in precision engineering projects, from conveyor systems to robotic arms.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads (5/16"-18), ensuring tight tolerances for secure fastening. Dimensions include a shoulder diameter of 3/8" with a tolerance of -0.004" to -0.002" and shoulder length of 13/32" with a tolerance of -0.005" to 0.005". It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental and safety standards for industrial use.
