S-97345A299 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 with 316 stainless steel construction, ideal for harsh environments and extended service life
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding assemblies
- Precise Class 3A thread fit ensures tight tolerances and secure fastening, reducing the risk of loosening under vibration
- Knurled socket head with hex drive provides enhanced grip and easy installation, even in confined spaces
- Long 2-1/2" shoulder length allows for accurate component alignment and spacing in complex mechanical designs
- Compliance with RoHS 3 and REACH regulations guarantees environmental safety and suitability for global markets
- Coarse UNC thread design enables quick assembly and disassembly, improving maintenance efficiency
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and marine equipment where corrosion resistance and high tensile strength are paramount. The Class 3A thread fit and 2-1/2" shoulder length provide exact positioning for rotating parts, bushings, and linkages, minimizing misalignment and wear. The knurled socket head with hex drive ensures secure tool engagement, reducing slippage during installation in high-vibration environments like robotics and aerospace assemblies. Its UNC coarse threads facilitate rapid assembly, while the RoHS 3 and REACH compliance makes it suitable for electronics and export-oriented industries, ensuring durability and regulatory adherence.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A precision fit for tight dimensional control. Key specifications include a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring consistent performance. It is manufactured from 316 stainless steel with a hardness of Rockwell B79 and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting safe and sustainable industrial use.
