S-97345A656 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
- Superior corrosion resistance in harsh environments due to 316 stainless steel construction, ideal for chemical, marine, and outdoor applications.
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under high-stress conditions.
- Precise alignment and smooth rotation enabled by the 2" shoulder with tight diameter and length tolerances, reducing wear on mating parts.
- Secure, high-precision thread engagement with Class 3A fit for minimal backlash and vibration resistance in critical assemblies.
- Easy installation and removal using a standard 3/16" hex drive and knurled head for improved grip, even with gloves.
- Broad industry compliance including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
- Durable coarse UNC threads that resist stripping and allow for quick assembly in demanding industrial settings.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common challenges in precision machinery, automation, and assembly systems. The 2" shoulder length with controlled tolerances acts as a precise pivot or spacer, minimizing misalignment and bearing surface wear in rotating assemblies. Its Class 3A thread fit and UNC coarse thread provide robust, vibration-resistant fastening, crucial for equipment subjected to dynamic loads. The socket head with knurling ensures secure tool engagement, reducing slippage during torque application. Ideal for use in conveyor systems, motor mounts, and robotic linkages, this screw offers long-term reliability and corrosion resistance in aggressive environments, reducing maintenance frequency and downtime.
Specification Summary & Compliance
The screw features a 5/16"-18 UNC thread with Class 3A fit for high precision, a shoulder diameter tolerance of -0.004" to -0.002", and shoulder length tolerance of ±0.005". It is manufactured in compliance with ASME B18.3 standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and material quality.
