S-93897A677 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant Nylon 6/6 construction eliminates rust and galvanic corrosion, ideal for harsh environments and electrical applications.
• Precision-machined 1/2" shoulder provides a stable bearing surface and accurate alignment for rotating parts like gears and pulleys.
• Wide operating temperature range (-40° to 185° F) ensures reliable performance in both extreme cold and high-heat conditions.
• 3/8"-16 UNC coarse thread with Class 2A fit enables faster assembly and secure holding power in plastic and soft materials.
• Internal hex socket drive (1/4") allows for high-torque installation and a clean, flush finish without protrusions.
• RoHS 3 (2015/863/EU) Compliant meets stringent environmental regulations for use in sensitive and regulated industries.
• Smooth head texture and standard socket profile prevents marring of surfaces and ensures compatibility with standard hex keys.

Professional Applications & Engineering Value

This Nylon 6/6 Plastic Shoulder Screw is engineered to solve common challenges in assembly design, such as component alignment and material incompatibility. The integral 1/2" shoulder diameter acts as a precise pivot or spacer, eliminating the need for separate washers and reducing assembly parts count in mechanisms like conveyor rollers, electronic enclosures, and light-duty linkages. Made from durable Nylon 6/6, it offers excellent electrical insulation and resistance to many chemicals, preventing short circuits and corrosion-induced failures. The 3/8"-16 UNC coarse thread provides strong pull-out resistance in tapped holes, while the hex socket drive ensures secure installation in tight spaces. Its right-hand thread and temperature resistance make it a reliable, non-conductive fastener for automotive, electronics, and food processing equipment.

Specification Summary & Compliance

This shoulder screw adheres to inch system measurements with a Class 2A thread fit for standard clearance and ease of assembly. The shoulder features a diameter of 1/2" with a tolerance of -0.012" to -0.002" and a length of 3/4" with a tolerance of -0.015" to 0.015" for precise dimensional control. It is manufactured to common industrial standards for UNC coarse threads and socket head profiles. The product is fully RoHS 3 (2015/863/EU) Compliant, ensuring it is free of restricted hazardous substances for global market acceptance.