S-91829A402 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 and passivated finish, ideal for harsh industrial environments.
- Precise component alignment ensured by a 3/8" diameter shoulder with tight tolerances for minimal play.
- High mechanical strength and durability from 70,000 psi tensile strength and Rockwell B55 hardness.
- Reliable, easy assembly with Class 2A thread fit and coarse UNC thread for quick installation and vibration resistance.
- Secure drive engagement via the socket head design, preventing stripping and allowing high torque application.
- Compliance with global standards, including RoHS 3 and REACH, ensuring safety and environmental responsibility.
- Versatile right-hand thread for standard applications, providing broad compatibility across machinery and equipment.
Professional Applications & Engineering Value
This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and mechanical stability challenges in industrial settings. The 18-8 stainless steel construction, combined with a passivated finish, offers excellent resistance to corrosion and wear, making it suitable for applications in automotive, aerospace, and manufacturing equipment where exposure to moisture and chemicals is common. The precise shoulder diameter of 3/8" with minimal tolerances ensures accurate positioning of moving parts, reducing misalignment and extending component life. With a coarse thread spacing and Class 2A thread fit, it provides secure fastening even under dynamic loads, while the socket head allows for efficient installation in confined spaces. Ideal for use in jigs, fixtures, and rotating assemblies, this screw delivers reliable performance and reduces maintenance needs.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features tight tolerances (diameter: -0.001" to 0", length: 0" to 0.002") to ensure precise fits. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental compliance for global industrial use.
