S-94035A309 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability in Harsh Environments: Crafted from 18-8 Stainless Steel with a passivated finish for superior corrosion resistance, ensuring long-term reliability in demanding industrial applications.
• Precise Component Alignment: Features a 3/8" shoulder diameter with a precise fit tolerance, providing accurate location and smooth rotation for parts like gears and pulleys.
• High Tensile Strength for Demanding Loads: Offers a 70,000 psi tensile strength and Rockwell B55 hardness, delivering robust performance under high-stress conditions.
• Secure and Efficient Installation: Equipped with a socket head (hex drive) for easy, high-torque installation and removal, minimizing tool slippage and damage.
• Reliable Thread Engagement: Utilizes a 1/4"-20 UNC coarse thread with Class 2A fit for quick assembly and secure fastening in various materials.
• Compliance with Global Standards: Meets RoHS 3 and REACH regulations, ensuring safety and environmental responsibility for international markets.
• Versatile Shoulder Length: The 1/2" shoulder length accommodates a wide range of component thicknesses, increasing application flexibility in machinery and assemblies.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and wear issues in industrial settings. The 18-8 stainless steel construction and passivated finish provide excellent resistance to corrosion and oxidation, making it ideal for use in humid or chemically aggressive environments like food processing, marine equipment, and automotive assemblies. The 3/8" shoulder diameter with precise tolerances ensures minimal play, reducing vibration and wear in rotating components such as bearings, linkages, and cam followers. With its UNC coarse thread and Class 2A fit, it enables rapid, secure fastening while the socket head design allows for compact installations in confined spaces. This combination of high tensile strength and durability supports reliable performance in high-load applications, from machinery frames to precision instruments, enhancing operational efficiency and reducing maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features precise tolerances: diameter from -0.001" to 0" and length from 0" to 0.002". It is manufactured from 18-8 stainless steel and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial use.