S-94496A460 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Load Distribution with a precise 3/8" shoulder diameter and tight tolerances, ensuring stable alignment and reducing wear in pivot and bearing applications.
• Superior Tensile and Shear Performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable operation under high-stress conditions.
• Corrosion-Resistant Zinc Plated Finish on steel material, extending service life in harsh industrial environments and reducing maintenance needs.
• Easy Installation and Removal thanks to the external hex drive and smooth head texture, allowing for quick assembly with standard tools.
• Accurate Thread Engagement with UNC coarse threads and Class 2A fit, providing secure fastening and vibration resistance in dynamic applications.
• Consistent Hardness and Durability with Rockwell B80 hardness, ensuring the screw maintains integrity under repeated loads and impacts.
• Compliance with Environmental Standards including RoHS 3 and REACH, making it suitable for global supply chains and regulated industries.

Professional Applications & Engineering Value

This 1/4"-20 shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. The zinc plated steel construction provides excellent corrosion resistance, ideal for outdoor or humid conditions, while the UNC coarse thread and Class 2A thread fit ensure reliable fastening in high-vibration environments like automotive assemblies or conveyor systems. The precisely machined shoulder with tight diameter and length tolerances acts as a pivot or spacer, reducing friction and extending the life of moving parts. With a tensile strength of 70,000 psi and external hex drive, it supports heavy-duty applications in manufacturing and robotics, delivering consistent performance and ease of maintenance for engineers and technicians.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy, including a shoulder diameter of 3/8" (tolerance: -0.004" to 0") and shoulder length of 1-5/16" (tolerance: -0.005" to 0.005"). Manufactured from steel with a zinc plated finish, it meets RoHS 3 (2015/863/EU) compliance under exemption 6(a) for lead in steel alloys and is REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence for industrial use.