M2 Button Head Hex Screws, 12.9 Grade Steel (10pcs)

M2 button head screws in 12.9-grade steel with a hex socket drive, sold in bags of 10 in a single length — 3, 4 or 5 mm. The low, rounded head sits close to the surface, which helps in the tight spaces of micro and whoop builds, camera mounts and small flight-controller stacks.

Key features

• 12.9 is the highest strength class for metric steel screws, so these resist stretching and snapping when tightened firmly
• Button head gives a lower profile than a socket cap head
• Hex socket drive for a hex key or driver

Specifications

• Thread: M2 metric
• Head: button head, hex socket
• Material: 12.9-grade alloy steel
• Lengths: 3 mm, 4 mm or 5 mm, measured from under the head to the tip
• Pack: 10 screws of one length

For motor mounting, choose a length that passes through the arm and engages the motor base by a few millimetres without reaching the windings — a screw that touches the stator can short the motor. 12.9 alloy steel is not stainless, so dry the hardware after flying in wet grass, and use a medium-strength threadlocker on screws that go into metal.