S-93897A517 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant Nylon 6/6 construction ensures long-term reliability in humid or chemically exposed environments without rust or galvanic corrosion.
• Precision-machined 3/8" shoulder diameter with tight tolerances provides accurate alignment and smooth rotational movement in pivot and bearing applications.
• Hex socket drive design allows for high-torque installation and secure, flush mounting without tool slippage in confined spaces.
• Class 2A thread fit with 5/16"-18 UNC coarse threads enables quick assembly and vibration resistance in plastic or soft material joints.
• Wide operating temperature range (-40° to 185°F) maintains mechanical properties and dimensional stability in varied thermal conditions.
• RoHS 3 compliance meets stringent environmental regulations for use in electronics and consumer products.
• Lightweight and electrically insulating reduces overall assembly weight and prevents electrical shorts in sensitive equipment.

Professional Applications & Engineering Value

Engineered for precision motion control and alignment, this Nylon 6/6 plastic shoulder screw solves critical challenges in assemblies requiring electrical isolation, corrosion resistance, and low friction. The 3/8" shoulder diameter with controlled tolerances acts as a reliable axle or spacer in conveyor rollers, pivoting mechanisms, and PCB mounts, eliminating metal-on-metal wear. Its coarse UNC threads and hex socket drive ensure vibration-resistant fastening in plastic housings and composite materials, while the smooth head profile prevents fiber snagging in textile or packaging machinery. Ideal for industrial automation, medical devices, and outdoor equipment, it reduces maintenance needs and extends service life in demanding conditions.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. Shoulder diameter tolerance is maintained at -0.012" to -0.002", and shoulder length tolerance at -0.015" to 0.015" for precise assembly. Manufactured from Nylon 6/6, it is fully RoHS 3 (2015/863/EU) compliant and operates within a -40° to 185°F temperature range, ensuring reliability across regulated and harsh environments.