S-93897A534 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant Nylon 6/6 construction ensures reliable performance in humid or chemical environments without rust or galvanic corrosion.
• Precision-machined shoulder with tight tolerances provides accurate alignment and smooth rotation for pivots, spacers, or guides in assemblies.
• Hex socket drive design allows for secure, high-torque installation with standard tools, reducing slip and head stripping risks.
• Wide temperature range from -40° to 185°F maintains dimensional stability and strength in both freezing and elevated heat conditions.
• Coarse UNC threads with Class 2A fit enable quick assembly and reliable holding power in plastic or soft material applications.
• RoHS 3 compliance meets environmental regulations for use in electronics, medical devices, and consumer products without hazardous substances.
• Smooth head texture and standard socket profile minimize friction and prevent damage to contacting surfaces during operation.

Professional Applications & Engineering Value

Engineered for precision motion and alignment tasks, this Nylon 6/6 shoulder screw excels in applications where metal fasteners cause wear, noise, or electrical conductivity issues. The 1/2" shoulder length with controlled diameter tolerance acts as a durable axle or spacer in machinery, conveyor systems, and electronic enclosures, reducing the need for additional bushings. Its right-hand UNC coarse threads provide strong engagement in plastic housings, while the hex socket head ensures easy installation in confined spaces. Ideal for industrial automation, food processing equipment, and insulating assemblies, it offers a lightweight, non-magnetic alternative that resists impact and vibration loosening.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. The shoulder diameter tolerance is -0.012" to -0.002", and shoulder length tolerance is -0.015" to 0.015" for precise dimensional control. Manufactured from Nylon 6/6 plastic, it complies with RoHS 3 (2015/863/EU) regulations, ensuring it is free from restricted hazardous substances. Suitable for use in temperatures from -40° to 185°F, it meets common industrial requirements for material stability and environmental safety.