Cap Screws Button Socket Nylon Patch Alloy Thermal Black Oxide 4-40 X 3/8 are compact, high-strength fasteners designed for secure, low-profile assembly in a variety of applications.

These cap screws feature a button head and a socket drive, combined with a nylon patch under the head to protect mating surfaces, reduce marring, and dampen vibration for enduring performance in precision equipment.

• Size: 4-40 thread with a 3/8″ length
• Material: Alloy steel with a nylon patch
• Finish: Thermal black oxide for added wear resistance and corrosion protection
• Head type: Button head with socket drive
• Drive: Internal socket for a clean, flush installation
• Surface protection: Nylon patch reduces surface damage and helps absorb vibrations

Ideal for electronics enclosures, control panels, machinery assemblies, automotive interiors, and other precision applications where a low-profile fastener, surface protection, and reliable torque are essential.

Why choose these cap screws? Engineered for durability and consistent performance, they deliver secure fastening with a smooth, unobtrusive presence in tight spaces while protecting delicate surfaces.

Enhance your hardware kit with these dependable 4-40 x 3/8 cap screws and experience precise, a high-quality finish that stands up to demanding environments.