S-97345A704 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 316 stainless steel construction, ideal for harsh environments and extended service life
- High-strength performance with 70,000 psi tensile and 35,000 psi shear strength for demanding mechanical loads
- Precise alignment and smooth rotation enabled by the 2 1/8" shoulder with tight diameter tolerance
- Reliable thread engagement with Class 3A fit UNC coarse threads, ensuring secure fastening in high-vibration applications
- Easy installation and removal using the 1/4" hex socket drive and knurled head for improved grip
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety
- Durable mechanical properties with Rockwell B79 hardness, providing excellent wear resistance
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 2 1/8" shoulder length and controlled diameter tolerance provide a stable bearing surface for rotating components like gears, pulleys, and linkages, minimizing misalignment and reducing wear. The Class 3A thread fit and UNC coarse thread design ensure rapid assembly and high clamp force retention in high-vibration environments, from conveyor systems to robotic arms. With exceptional corrosion resistance and compliance with ASME B18.3, this fastener delivers long-term reliability in manufacturing, marine, and chemical processing applications where precision and durability are paramount.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC thread with Class 3A fit for precise thread engagement. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring accurate dimensional control. It is manufactured to meet ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safe and reliable use in industrial settings.
