S-91273A607 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 and black oxide finish, ideal for harsh industrial environments
- Precise component alignment ensured by the 3" shoulder with standard fit, minimizing assembly play and vibration
- High-strength performance delivering 70,000 psi tensile and 35,000 psi shear strength for demanding mechanical applications
- Secure, non-slip installation with knurled socket head and 5/32" hex drive, preventing tool slippage during torque application
- Reliable thread engagement through 5/16"-18 UNC coarse threads with Class 2A fit, facilitating faster assembly and disassembly
- Enhanced durability with Rockwell B55 hardness, maintaining structural integrity under repeated loads
- Global compliance assurance meeting RoHS 3 and REACH regulations for safe use in international markets
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and pivot point requirements in precision assemblies. The 18-8 stainless steel material, combined with a black oxide finish, provides excellent corrosion resistance, reducing maintenance in humid or chemically exposed settings. The 3" shoulder length acts as a precise spacer or pivot in machinery, preventing misalignment in rotating components like gears, linkages, and conveyor systems. Its UNC coarse threads and Class 2A fit ensure quick, secure fastening with minimal risk of cross-threading, while the knurled socket head enhances grip for high-torque applications. Ideal for use in automation, automotive, and heavy equipment, this screw delivers consistent performance where dimensional accuracy and shear strength are paramount.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 2A fit tolerance for precise thread engagement. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring high dimensional accuracy. Manufactured from 18-8 stainless steel with black oxide finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial and export applications.
