S-91273A256 5/8"-11 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
- Precise component alignment ensured by the 2" shoulder with tight diameter tolerance for stable positioning
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
- Easy installation and removal using the 5/16" hex socket drive and knurled head for secure tool grip
- Reliable thread engagement with Class 2A UNC coarse threads providing consistent fastening performance
- Durable wear resistance from Rockwell B55 hardness, extending service life in high-stress machinery
- Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial assemblies. The 2" precision shoulder acts as a stable pivot or bearing surface, eliminating misalignment in rotating components like gears, pulleys, and linkages. Its UNC coarse thread (5/8"-11) with Class 2A fit ensures rapid installation and vibration resistance, while the hex socket drive and knurled head facilitate secure torque application in confined spaces. Made from corrosion-resistant 18-8 stainless steel, it withstands exposure to moisture, chemicals, and temperature variations, making it ideal for machinery, automotive, and conveyor systems where precision shoulder screws maintain operational accuracy under heavy loads.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with Class 2A thread fit for consistent fastening. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise dimensional control. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious manufacturing processes.
