Mini 4WD Long M2 x 40 Socket Button Fastener M4WD-28 by 3Racing  [M4WD-28]

Tamiya Mini 4WD M2 x 40 Scoket Buttom Screw - 3RACING M4WD-28
Price:
USD$1.90
Brand:
3Racing
Model:
M4WD-28
Condition:
Brand New
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M4WD-28 M2 x 40 long socket button screw for competitive Mini 4WD setups

The M4WD-28 is a single M2 x 40 socket button head screw supplied for setups that require extended threaded engagement, such as stacked chassis, elevated standoffs and accessory mounts used in racing and tuning work. The component uses a socket-drive button head and is intended as a straightforward spare for parts accepting M2 thread at this length.

Prior to use, confirm the receiving thread type, insert or nut and the available clearance behind the mounting surface. Measure standoff and hole depth and fit with the correct M2 hex key, applying measured hand torque to avoid stripping threads or damaging lightweight chassis parts.

 

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1 Reviews
rating
Excellent service, two of the items I purchased were out of stock but was given fair options on refund, store credit or replacement. I opted for replacement as there was a different version available and one of the items did arrive bent and they sent out

What chassis situations call for a 40 mm M2 fastener?

Use when race setups add spacing between parts, such as stacked plates, reinforced mounts or tall accessory brackets that put the mating thread out of reach for standard screws.

How should I check for correct thread engagement before racing?

Measure the hole depth and any spacer thickness so the screw achieves secure engagement without bottoming out or leaving too little thread contact. Confirm the insert or nut type for consistent clamping.

Any guidance on tightening for tuned builds?

Tighten to a firm hand torque that secures components but preserves threaded inserts and plastic parts. For repeatable setups, mark torque practice with the same driver and technique.

Are there common accessories to pair with this screw in race setups?

Common pairings include low-profile washers to spread load on thin panels and appropriate nuts where no captive insert exists; these help maintain reliable clamping under vibration.