6-40 x 5/8 1960 Series Alloy Steel Socket Head Cap Screw with Nylon Insert is a socket-driven cap screw for assemblies that need a built-in prevailing-torque feature. Its nylon insert creates a frictional locking action in the threaded joint while preserving top-side internal hex drive access for installation.

Common uses include packaging machinery, conveyor equipment, and production cells, where a precise socket head fastener with added loosening resistance can simplify maintenance and replacement planning. Review thread size, length, mating material, available drive access, and insert location before release to production or maintenance use.

Cold Headers provides catalog depth for specialty socket fasteners and helps purchasers identify the correct alloy steel nylon insert configuration.

Technical Highlights

• Series: 1960 Series
• Material: Alloy Steel
• Thread Size: 6-40
• Length: 5/8 in.
• Drive Type: Internal Hex
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 5/64 in.
• Nylon Insert Location (N): 1/8 in. +/- 1/2 pitch

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.