S-94035A308 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load.
• Precise alignment and secure fit enabled by the 3/8" shoulder diameter with tight tolerances, minimizing component movement.
• Easy installation and removal using a standard 5/32" hex socket drive, reducing assembly time and tool wear.
• Consistent thread engagement with UNC coarse threads and Class 2A fit, ensuring reliable fastening in various applications.
• Compliance with environmental regulations, meeting RoHS 3 and REACH standards for safe and sustainable use.
• Versatile right-hand thread design suitable for a wide range of machinery and alignment tasks.

Professional Applications & Engineering Value

This 1/4-20 UNC shoulder screw is engineered to address critical alignment challenges in industrial settings. The 3/8" shoulder diameter with precise tolerances provides a stable pivot or bearing surface, preventing misalignment in assemblies like rotating shafts, gears, and linkages. Made from 18-8 stainless steel with a passivated finish, it resists corrosion from moisture, chemicals, and outdoor exposure, extending service life in demanding applications such as automotive, aerospace, and manufacturing equipment. The hex socket head allows for high-torque installation in confined spaces, while the Class 2A thread fit ensures smooth engagement without cross-threading. By combining material robustness with dimensional accuracy, this screw reduces maintenance downtime and enhances operational reliability.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent performance. Key dimensions include a shoulder diameter of 3/8" (tolerance: -0.001" to 0") and shoulder length of 3/8" (tolerance: 0" to 0.002"), ensuring precise assembly. It is manufactured from 18-8 stainless steel and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally responsible sourcing and usage.