M2/M2.5/M3 Black Round Head Hex Socket Cap Screws (Pack of 10)

Black-coated carbon steel round head (button head) screws with an internal hex (Allen) socket, sold in packs of 10. The low, wide head spreads clamping force over more area than a standard cap screw, which suits carbon frame plates, canopies, 3D-printed mounts and electronics where a countersink is not possible.

Key features

• Three metric thread sizes, M2, M2.5 and M3, in lengths from 4 mm to 45 mm; choose the exact size and length from the options
• Low-profile domed head with a wide bearing surface, gentler on carbon and printed parts
• Internal hex socket for tightening with a standard hex key or driver
• Carbon steel with a black coating for corrosion resistance
• 10 screws of one size and length per pack

Specifications

• Head type: Round (button) head, internal hex socket
• Thread: Metric M2, M2.5, M3
• M2 lengths: 4, 5, 6, 8, 10, 12, 14 mm
• M2.5 lengths: 5, 6, 8, 10, 12 mm
• M3 lengths: 6, 8, 10, 12, 14, 16, 20, 25, 30, 35, 40, 45 mm
• Material: Carbon steel, black coated
• Quantity: 10 screws per pack

Button head length is measured from under the head. These heads take less tightening torque than full socket head cap screws, so use them for plates, covers and mounts rather than highly loaded structural joints; M3 matches 30.5x30.5 stacks and most 5-inch frame hardware.