S-97345A623 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 thanks to 316 stainless steel construction, ideal for harsh environments and chemical exposure.
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress loads.
- Precise alignment and smooth rotation ensured by the Class 3A thread fit and a standard shoulder with controlled diameter and length tolerances.
- Easy installation and removal with a hex socket drive and knurled head for improved grip and torque application.
- Robust durability backed by a Rockwell B79 hardness rating, providing excellent wear resistance and long service life.
- Guaranteed interchangeability and quality through compliance with the ASME B18.3 standard for dimensional consistency.
- Environmentally safe and compliant manufacturing, meeting RoHS 3 and REACH regulations for use in regulated industries.
Professional Applications & Engineering Value
This 316 Stainless Steel Shoulder Screw is engineered to address critical challenges in precision assembly and motion control systems. The 4 1/4" shoulder length and 3/8" shoulder diameter provide a stable pivot or spacer, minimizing misalignment and reducing wear on mating components. The coarse 5/16"-18 UNC thread with a Class 3A fit ensures fast, secure engagement in demanding applications, from machinery and automotive jigs to conveyor systems. Its hex socket drive and knurled head facilitate easy handling in tight spaces, while the high-strength 316 stainless steel offers outstanding corrosion resistance, making it suitable for marine, chemical processing, and food-grade equipment where reliability is non-negotiable.
Specification Summary & Compliance
This shoulder screw adheres to strict dimensional and performance criteria, including a Class 3A thread fit for precision and a shoulder diameter tolerance of -0.004" to -0.002" with a shoulder length tolerance of -0.005" to 0.005". It is manufactured in accordance with the ASME B18.3 specification and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial applications.
