*USED* Screw M4x12; Hex countersunk head

This USED M4x12 hex countersunk screw is a compact, flush-mount fastener designed to disappear into your build while delivering reliable clamping power. With a 4 mm diameter and 12 mm length, it fits standard M4 threaded holes and accepts a hex (Allen) drive for confident, torque-friendly installation. The countersunk head lets the screw sit flush with surfaces such as panels, housings, cabinetry, and electronics enclosures, creating a clean, professional look without protruding hardware. Condition: Used. Expect typical limited cosmetic wear consistent with pre-owned hardware. The screw is sold as-used; inspect the threads and seating before final assembly to ensure correct fit in your project.

Key specifications

• 
  Size: M4 x 12 mm


• 
  Head type: Hex countersunk (flat head)


• 
  Drive: Hex/Allen


• 
  Material/finish: Not specified


• 
  Condition: Used

Practical applications

• Panel mounting in electronics enclosures or instrument cases


• Furniture assembly where a flush surface is desired


• Mounting brackets or components to metal or wood frames with threaded holes


• DIY projects that require a compact, low-profile fastener

Why choose this used screw

Opt for this cost-conscious option when the project tolerates pre-owned hardware and you need a reliable, hex-drive fastener that preserves a clean surface. The M4 x 12 length is a versatile choice for many standard setups, balancing grip length with a compact head.

Installation tips

• Use a hex key (Allen wrench) of the correct size to avoid stripping the head—commonly 2.0 mm for M4 hex socket screws, but verify with your existing hardware.


• Align the screw with a properly tapped hole or corresponding nut/insert for secure engagement.


• Clean any debris from threads before installation to ensure smooth threading and seating.

Care and storage

Store in a dry, organized container to prevent loss and corrosion. Since the finish isn’t specified, handle with care if moisture is a concern in your environment.