S-97345A811 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 chemical exposure
- Precise alignment and smooth rotation ensured by the 2-1/2" shoulder with tight diameter tolerance for reduced wear
- High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding load applications
- Secure, tamper-resistant installation via the 5/16" hex socket drive and knurled head for enhanced grip
- Reliable thread engagement with Class 3A fit and coarse UNC thread for quick assembly and vibration resistance
- Long-term durability supported by Rockwell B79 hardness and compliance with ASME B18.3 manufacturing standards
- Safe for regulated industries with full RoHS 3 and REACH compliance, meeting environmental and health standards
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and assembly jigs where alignment and corrosion resistance are paramount. The 2-1/2" shoulder length acts as a sturdy pivot or spacer, minimizing misalignment and bearing wear in rotating components. Its coarse UNC thread and Class 3A fit ensure rapid, secure fastening even in high-vibration environments, while the hex socket drive and knurled head facilitate easy installation in confined spaces. Ideal for use in chemical processing, marine equipment, and food machinery, the screw’s high tensile and shear strength provide reliable performance under continuous stress, reducing maintenance downtime and extending service life.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC thread with Class 3A fit for precise thread engagement, and a shoulder diameter tolerance of -0.004" to -0.002" for accurate alignment. Manufactured in accordance with ASME B18.3 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of hazardous substances and suitable for global industrial use.
