In Demand 5/16-18 X 1/2″ Socket Cap Screws Button Head Hex Socket Drive Nylon Patch Alloy Steel Thermal Black Oxide (100 / Pkg.)

Engineered for strength and precise fit, this Cap Screws Button Socket Nylon Patch Alloy Thermal Black Oxide 5/16-18 X 1/2 delivers dependable performance in demanding applications. Featuring a button-style socket head, an alloy steel body, and a protective black oxide finish, these fasteners provide a clean look and secure clamping in machinery, automotive, and equipment assemblies. The nylon patch under the head cushions mating surfaces and helps resist galling during installation and operation.

Material: Alloy steel for high strength and durability.

Finish: Black oxide offers corrosion resistance with a low-gloss, professional appearance.

Head Type: Button socket head for a low-profile, clean finish and recessed installation.

Thread Size & Length: 5/16-18 UNC, 1/2 inch long.

Nylon Patch: Integrated nylon patch under the head to protect mating surfaces and reduce friction and wear.

Heat Treatment: Thermally treated for enhanced hardness and load-bearing capability.

Applications: Ideal for automotive, machinery, electronics enclosures, and equipment assemblies requiring a secure, aesthetically pleasing fastener solution.

Specifications

Thread: 5/16-18 UNC

Length: 1/2 inch

Head: Button socket

Material: Alloy steel

Finish: Black oxide

Nylon patch: Yes

Why choose these cap screws?

They combine robust metal strength with a protective nylon interface and a durable black oxide finish, delivering reliable performance in vibration-prone environments while maintaining a neat, professional look in your assemblies. Perfect for a range of standard and precision applications where a compact, low-profile fastener is required.