S-97345A106 4-40 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 thanks to 316 stainless steel construction
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for demanding applications
- Precise assembly and alignment ensured by the Class 3A thread fit and tightly toleranced shoulder
- Secure, non-slip installation provided by the knurled socket head and 5/64" hex drive
- Reliable performance in rotating assemblies due to the standard shoulder fit and right-hand UNC coarse threads
- Enhanced durability and longevity from a Rockwell B79 hardness rating
- Compliance with stringent environmental regulations, being RoHS 3 and REACH compliant
Professional Applications & Engineering Value
This 316 Stainless Steel Shoulder Screw is engineered to solve critical alignment and corrosion challenges in industrial settings. The 4-40 UNC coarse thread with a Class 3A fit provides secure fastening with minimal backlash, essential for precision machinery and rotating components. The 7/8" shoulder length with tight diametrical and length tolerances acts as a precise pivot or spacer, reducing wear and maintaining alignment in assemblies like linkages, gears, and pivoting mechanisms. The knurled socket head ensures a firm grip during installation, preventing tool slippage. Made from 316 stainless steel, it offers excellent resistance to chemicals and moisture, making it ideal for marine, chemical processing, and food machinery applications where reliability is non-negotiable.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. The shoulder diameter is 1/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 7/8" with a tolerance of -0.005" to 0.005", ensuring consistent performance. It is manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated industrial environments.
