S-93897A559 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 1" shoulder length with tight ±0.015" tolerance provides accurate spacing and alignment for rotating components like gears and bearings.
• Class 2A thread fit with 5/16"-18 UNC coarse threads enables quick assembly and secure fastening in plastic or soft materials.
• Smooth socket head with hex drive design allows for clean installation and high torque application without head strippage.
• Wide temperature range (-40° to 185°F) maintains structural integrity in both freezing and elevated temperature conditions.
• RoHS 3 compliance meets international environmental standards for hazardous substance restrictions.
• Right-hand thread direction with standard shoulder fit ensures compatibility with existing industrial equipment and simplifies maintenance.

Professional Applications & Engineering Value

This Nylon 6/6 plastic shoulder screw solves critical engineering challenges in applications requiring electrical insulation, weight reduction, and corrosion resistance. The 1" precision shoulder acts as a reliable pivot point or spacer in assemblies like conveyor rollers, printing machinery, and electronic enclosures, eliminating metal-on-metal contact and reducing wear. Its coarse UNC threads provide superior holding power in plastic housings, while the socket head design enables flush mounting in tight spaces. Ideal for food processing, medical devices, and outdoor equipment where non-conductive, chemical-resistant fasteners are essential for durability and safety.

Specification Summary & Compliance

Manufactured to inch system standards with Class 2A thread fit for consistent engagement. Shoulder diameter tolerance of -0.012" to -0.002" and shoulder length tolerance of ±0.015" ensure precise dimensional control. Complies with RoHS 3 (2015/863/EU) regulations, containing no restricted hazardous substances. Threads conform to 5/16"-18 UNC coarse spacing specifications for reliable performance in industrial assemblies.