S-97345A413 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Precise alignment and smooth rotation ensured by the Class 3A thread fit and standard shoulder, reducing wear in assemblies.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, providing reliable performance under heavy loads.
• Secure, non-slip installation from the knurled socket head and 5/64" hex drive, preventing tool slippage and damage.
• Excellent durability backed by Rockwell B79 hardness, maintaining integrity in repetitive or high-stress applications.
• Broad compatibility with 4-40 UNC coarse right-hand threads, fitting standard components for easy integration.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in global markets.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The Class 3A thread fit and precise shoulder dimensions provide exceptional accuracy for applications in machinery, automotive, and electronics, where consistent alignment is critical. The knurled socket head with a 5/64" hex drive enhances grip during installation, reducing the risk of stripping and improving assembly efficiency. Made from 316 stainless steel, it offers superior resistance to chemicals and moisture, making it ideal for demanding environments like marine or chemical processing. Its high tensile and shear strength ensures long-term reliability, minimizing downtime and maintenance costs in industrial shoulder screw applications.

Specification Summary & Compliance

This shoulder screw features a 4-40 UNC coarse thread with Class 3A precision fit for tight tolerances, ensuring smooth engagement and reduced backlash. Key dimensions include a head diameter of 0.25", shoulder diameter of 1/8" with tolerance from -0.004" to -0.002", and thread length of 5/32". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its safety and environmental standards for industrial use.