M3 Socket Head Cap Screws with Blue Threadlocker, Black (Pack of 10)

Black M3 socket head cap screws with a pre-applied band of blue, medium-strength threadlocker, sold in packs of 10. M3 is the standard thread for 5-inch class motor mounts, 30.5 × 30.5 mm flight-controller stacks and most frame hardware, and the threadlocker keeps the screws tight under motor vibration.

Key features

• Eight lengths to choose from: 6, 8, 10, 12, 14, 16, 18 or 20 mm.
• Blue threadlocker resists vibration loosening yet still lets you remove the screw with a hex key for repairs.
• Socket head with an internal hex drive that takes a 2.5 mm hex key.
• Steel with a black finish.

Specifications

• Thread: M3
• Head: socket head cap, internal hex (Allen) drive
• Lengths: 6, 8, 10, 12, 14, 16, 18, 20 mm
• Finish: black
• Threadlocker: pre-applied blue, medium strength
• Quantity: 10 screws per pack

For motor screws, size the length to the arm thickness plus the motor's thread depth: a screw that is too long can reach the stator windings and short the motor. A frame rebuild usually needs short screws for the motors and longer ones through stack plates and standoffs, so keep a couple of lengths on hand.