S-91273A183 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Enhanced grip and tool engagement thanks to the knurled hex socket head design
- High mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Precise component alignment enabled by the 3" shoulder length with tight manufacturing tolerances
- Reliable and quick assembly with Class 2A UNC coarse threads for easier starting and reduced cross-threading risk
- Long-term durability supported by Rockwell B55 hardness for excellent wear resistance
- Environmental and regulatory compliance meeting RoHS 3 and REACH standards for global market use
Professional Applications & Engineering Value
This stainless steel shoulder screw is engineered to solve critical alignment and pivot point challenges in precision machinery and automated systems. The 3" shoulder length with minimal tolerance variation ensures exact component positioning, eliminating misalignment in assemblies like rotating shafts, gears, and linkages. The 5/16"-18 UNC coarse thread and Class 2A thread fit provide secure fastening with high resistance to vibration loosening, while the hex socket knurled head offers superior non-slip torque application. Made from 18-8 Stainless Steel, it delivers excellent corrosion resistance in demanding environments such as food processing, packaging equipment, and outdoor machinery, reducing maintenance frequency and extending service life.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent assembly performance. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring high dimensional accuracy. The product is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industrial applications.
