S-94496A580 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 70,000 PSI and shear strength of 35,000 PSI, this shoulder screw reliably handles high-stress applications without failure.
• Superior Corrosion Resistance: Zinc plating provides a durable protective layer, extending service life in harsh industrial environments and reducing maintenance needs.
• Precision Fit and Alignment: Class 2A thread fit and standard shoulder fit ensure accurate positioning and smooth assembly, minimizing play and vibration in machinery.
• Enhanced Durability: Rockwell B80 hardness offers excellent wear resistance, maintaining integrity through repeated use and high-cycle operations.
• Easy Installation and Removal: External hex drive and smooth hex head allow for quick, secure fastening with standard tools, speeding up assembly and disassembly processes.
• Reliable Coarse Thread Performance: 1/4"-20 UNC coarse threads provide strong holding power and are less prone to cross-threading, ideal for rapid assembly in production lines.
• Compliance with Environmental Standards: Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries and global market acceptance.

Professional Applications & Engineering Value

This steel shoulder screw is engineered to address critical alignment and load distribution challenges in industrial applications. The 1 3/4" shoulder length acts as a precise pivot or spacer, reducing wear on moving parts in machinery like conveyor systems, robotic arms, and assembly jigs. The zinc plated finish combats corrosion in humid or outdoor settings, while the UNC coarse threads ensure quick, secure fastening even in high-vibration environments. With a Rockwell B80 hardness and 70,000 PSI tensile strength, it withstands repetitive stress and heavy loads, minimizing downtime and replacement costs. Ideal for precision engineering where dimensional stability and durability are paramount, this screw delivers consistent performance in automotive, aerospace, and heavy equipment sectors.

Specification Summary & Compliance

This shoulder screw features 1/4"-20 UNC coarse threads with a Class 2A thread fit for precise tolerance, and a shoulder diameter of 3/8" with tight tolerances (-0.004" to 0") to ensure accurate alignment. Manufactured from high-strength steel with a zinc plated finish, it complies with RoHS 3 (2015/863/EU) with exemption 6(a) and REACH (EC 1907/2006) standards, meeting essential environmental and safety regulations for industrial components.