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.