S-97832A125 3/8"-16 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 with 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
- Precise component alignment and pivot points ensured by the 1/2" shoulder diameter with tight tolerances for reliable assembly.
- High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
- Secure, non-slip installation provided by the knurled socket head and 1/4" hex drive, reducing tool slippage and damage.
- Reliable, coarse-thread engagement with the 3/8"-16 UNC thread and Class 3A fit for quick assembly and vibration resistance.
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring material safety and standardization.
- Durable wear resistance from the Rockwell B55 hardness, maintaining integrity under repeated use.
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to address critical alignment and pivot challenges in machinery, automation, and assembly fixtures. The 1/2" shoulder diameter with controlled tolerances provides a precise bearing surface, eliminating misalignment and reducing wear on moving parts. The 3/8"-16 UNC coarse thread and Class 3A thread fit ensure rapid, secure fastening in high-vibration environments, while the knurled socket head with a 1/4" hex drive allows for high-torque installation without cam-out. Its high tensile and shear strength makes it suitable for heavy-duty applications, from conveyor systems to robotic arms, where durability and precision are paramount. The stainless steel material offers excellent corrosion resistance, extending component life in demanding industrial settings.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC thread with a Class 3A thread fit for precise engagement. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 1 7/8" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring environmental safety and material quality for industrial use.
