Dubro Socket Head Cap Screw 4-40x1/2 Tool - DUB3115

The Dubro DUB3115 is a 4-40 x 1/2 inch socket head cap screw designed for use in RC aircraft builds and repairs. These small-format fasteners are a staple in the RC workshop, used to secure servo mounts, control horns, motor mounts, and other hardware where a clean, recessed hex drive is preferred over a standard slotted screw. Dubro has long been a trusted name in RC hardware, and the 3115 delivers the consistent threading and dimensional accuracy that precision assembly demands.

Key Features

• 4-40 thread size with 1/2 inch length — a commonly used fastener size across a wide range of RC aircraft hardware
• Socket head (hex drive) design allows for higher torque application in tight spaces compared to slotted or Phillips head screws
• Suitable for metal-to-metal and metal-to-composite fastening applications in airframe and component assembly
• Consistent threading and finish support reliable, repeatable installation across multiple builds or repair sessions

What's Included

• Dubro 3115 socket head cap screws (4-40 x 1/2 inch) — quantity as packaged

What You Need

• Appropriate hex key or Allen wrench sized for 4-40 socket head cap screws
• Threadlock adhesive recommended for vibration-prone installations