S-94731A650 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy loads and stress.
• Precision Class 2A thread fit with UNC coarse thread for easy, secure assembly and reduced risk of cross-threading.
• Robust Rockwell B55 hardness provides excellent wear resistance and maintains thread integrity through repeated use.
• Convenient external hex drive with 5/8" head width allows for straightforward installation and removal using standard tools.
• Accurate shoulder dimensions (3/8" diameter, 1 7/16" length) with tight tolerances ensure precise alignment in assemblies.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and meets global industry standards.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automation systems, and precision equipment. The 1/4"-20 UNC coarse thread and Class 2A fit facilitate quick, secure fastening, reducing assembly time and minimizing thread damage. The smooth hex head with external drive ensures compatibility with standard wrenches, enhancing maintenance efficiency. Its high tensile strength (70,000 psi) and corrosion-resistant material make it suitable for demanding applications like pivots, spacers, and rotating components, where precise shoulder positioning and long-term reliability are essential. This screw delivers consistent performance in environments exposed to moisture, chemicals, or mechanical stress, supporting operational uptime and reducing replacement frequency.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard tolerance, a shoulder diameter of 3/8" (tolerance: -0.004" to 0"), and a shoulder length of 1 7/16" (tolerance: -0.005" to 0.005"). Manufactured from 18-8 stainless steel with a hardness of Rockwell B55, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial fasteners.