S-91273A604 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
- Precise component alignment ensured by the 2-1/4" shoulder with tight diameter tolerance for reduced assembly play
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure, non-slip installation via the knurled head and 5/32" hex socket drive for reliable torque transmission
- Durable wear resistance from the Black Oxide finish, enhancing surface protection and longevity
- Easy assembly with coarse UNC threads providing quick engagement and reduced cross-threading risks
- Compliance with global standards including RoHS 3 and REACH for safe, regulated use in various markets
Professional Applications & Engineering Value
This Black Oxide Socket Head Shoulder Screw is engineered to address critical alignment and durability challenges in industrial assemblies. The 2-1/4" shoulder length and precise 5/16"-18 UNC coarse threads ensure accurate positioning of components like gears, pulleys, and linkages, minimizing misalignment and wear. Made from 18-8 Stainless Steel, it resists corrosion in moist or chemical-exposed settings, while the Rockwell B55 hardness and 70,000 psi tensile strength provide reliable performance under high stress. The hex socket drive and knurled head facilitate secure installation in tight spaces, making it ideal for machinery, automotive, and precision equipment where consistent alignment and long-term reliability are essential.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit and UNC coarse thread standards for consistent engagement. Shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005" for precise dimensional control. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental and safety standards are upheld.
