S-97768A360 5/16"-18 ASME B18.3 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
- Enhanced corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
- Superior load-bearing capability thanks to a tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable performance under stress.
- Precise alignment and secure positioning with a 3/8" shoulder diameter and standard fit, minimizing component wear and misalignment.
- High thread reliability with Class 3A fit and 5/16"-18 UNC coarse threads, ensuring consistent engagement and vibration resistance.
- Easy installation and removal using the hex drive and knurled head, providing a firm grip and reducing tool slippage.
- Durable mechanical properties from Rockwell B55 hardness, offering long-term wear resistance and structural integrity.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This shoulder screw is engineered to address common industrial challenges such as component misalignment and premature wear in high-stress assemblies. The 18-8 stainless steel material, combined with a black oxide finish, provides excellent corrosion resistance, making it suitable for applications in machinery, automotive, and outdoor equipment. The 3/8" shoulder diameter and precise tolerances ensure accurate alignment of moving parts, reducing friction and extending service life. With UNC coarse threads and a Class 3A fit, it offers secure fastening in dynamic environments where vibrations are a concern. The hex drive and knurled head facilitate quick installation, enhancing productivity in assembly lines. Ideal for pivots, axles, and spacers, this fastener delivers consistent performance in demanding industrial shoulder bolt applications.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for precise thread engagement, and a shoulder diameter of 3/8" with tight tolerances (-0.004" to -0.002") to ensure accurate component alignment. It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally safe and reliable industrial use.
