S-90807A126 5/16"-18 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 load-bearing capacity with 140,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through black oxide finish, extending service life in demanding industrial environments
- Precision alignment and reduced wear with Class 3A thread fit and standard shoulder fit for consistent mating with components
- Enhanced durability from Rockwell C32 hardness, maintaining structural integrity under repeated use
- Secure installation and removal with hex drive and knurled head for improved grip during torque application
- Wide compatibility with UNC coarse threads and 1" shoulder length, suitable for various industrial assemblies
- Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
This alloy steel shoulder screw addresses critical engineering challenges in precision machinery and industrial equipment. The 5/16"-18 UNC coarse threads and Class 3A thread fit ensure secure fastening with minimal backlash, vital for applications requiring exact positioning, such as in rotating assemblies or pivoting mechanisms. The 1" shoulder length provides a precise bearing surface, reducing wear on mating parts and maintaining alignment under lateral loads. The black oxide finish offers corrosion resistance, extending component life in humid or chemically exposed environments. Combined with 140,000 psi tensile strength and Rockwell C32 hardness, this screw delivers reliable performance in automotive, aerospace, and manufacturing sectors where durability and precision are paramount.
Specification Summary & Compliance
This shoulder screw features 5/16"-18 UNC coarse threads with Class 3A fit for high precision, and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005" ensuring consistent dimensional accuracy. Manufactured from alloy steel with black oxide finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting industry standards for environmental safety and material quality.
