S-91273A597 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 corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
- High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance in demanding applications.
- Precise alignment and reduced wear due to the 3/4" shoulder length with tight tolerances, ensuring stable component positioning.
- Easy installation and removal with a knurled socket head and 5/32" hex drive, providing a secure grip and reducing tool slippage.
- Durable thread engagement featuring UNC coarse threading and Class 2A fit for quick assembly and vibration resistance.
- Consistent hardness at Rockwell B55, maintaining structural integrity under repeated stress.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.
Professional Applications & Engineering Value
This 5/16"-18 UNC shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. The 18-8 stainless steel material combined with a black oxide finish provides superior corrosion resistance, extending service life in moist or chemical-exposed settings. The 3/4" shoulder length with precise tolerances allows for accurate pivot points and bearing surfaces, reducing friction in assemblies like rotating shafts and linkages. Its UNC coarse thread and Class 2A fit ensure quick, secure fastening in high-vibration environments, from automotive systems to industrial equipment, enhancing operational reliability and minimizing maintenance downtime.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Key specifications include a shoulder diameter of 5/16" (tolerance: -0.004" to -0.002") and shoulder length of 3/4" (tolerance: -0.005" to 0.005"). The product is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for industrial applications requiring strict regulatory adherence.
