S-94035A301 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty performance
• Precise assembly alignment enabled by the 5/16" diameter shoulder with tight tolerances for accurate component positioning
• Easy installation and removal with smooth socket head and 5/32" hex drive, reducing tool slippage and assembly time
• Secure thread engagement through Class 2A UNC coarse threads, ensuring consistent fastening in high-vibration applications
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Versatile right-hand thread design compatible with standard UNC 1/4-20 components for broad application flexibility

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw delivers critical engineering solutions where precise alignment and corrosion resistance are paramount. The 5/16" shoulder diameter with minimal tolerance variation provides exact locating and rotational control in assemblies, eliminating misalignment issues in machinery, automation systems, and precision instruments. The passivated finish enhances surface durability against oxidation and chemical exposure, extending service life in demanding environments. With its UNC coarse thread and Class 2A fit, it ensures rapid assembly and reliable retention under dynamic loads, making it ideal for pivots, spacers, and rotating components in manufacturing equipment. The combination of 70,000 psi tensile strength and hex socket drive supports high-torque installation without compromising fastener integrity.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy. The shoulder maintains a diameter of 5/16" with tolerance of -0.001" to 0" and length of 1/4" with tolerance of 0" to 0.002" for precise fit. Manufactured from 18-8 stainless steel with passivated finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.