S-8077A595 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
- Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments like marine or chemical processing.
- Enhanced durability and wear resistance from the black oxide finish, reducing maintenance and extending service life.
- High tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable performance in demanding applications.
- Precise Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening under vibration.
- Knurled socket head provides improved grip for easier installation and removal with standard hex tools.
- Accurate shoulder diameter and length with tight tolerances for consistent alignment and positioning in assemblies.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards are met.
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 coarse threading and Class 3A thread fit provide secure fastening in high-vibration environments, while the precise shoulder diameter of 3/8" and length of 4 1/4" ensure accurate component positioning in machinery, pivots, and rotating assemblies. With a Rockwell B79 hardness and high strength ratings, it resists wear and deformation, making it ideal for heavy-duty fastening in automotive, aerospace, and manufacturing sectors where reliability and corrosion resistance are critical.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for precise tolerance, a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002"), and shoulder length of 4 1/4" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for dimensional accuracy and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use.
