Quick answer
Use the eitech Threaded Pin M4x4 to join two metal strips or attach a small part where a short, threaded connection is needed. Its M4x4 size means a 4 mm thread diameter and 4 mm length, perfect for thin assemblies.
When to choose the M4x4 over longer pins
The Threaded Pin M4x4 is one of the shortest threaded fasteners in the eitech system. Use it when the combined thickness of the parts you are joining is 4 mm or less—typically two thin metal strips. If you need to pass through a thicker bracket or add a nut, step up to a longer pin like the M4x6 or M4x8. The M4x4 has no extra thread for a nut, so it works best as a direct screw-in connection.
How to install the Threaded Pin M4x4
- Check the material thickness: Stack the parts you want to join and measure their total thickness. It must be 4 mm or less. If it is thicker, choose a longer pin. Common mistake: forcing the pin through parts that are too thick can strip the threads or bend the pin.
- Align the holes: Insert the threaded end through the aligned holes of the parts. The pin should slide in smoothly without excessive force. If it does not, realign the holes.
- Tighten by hand only: Turn the pin clockwise using your fingers or a small screwdriver until it is snug. Do not use a power tool—the short thread can easily over-tighten and damage the metal. Stop turning as soon as you feel resistance. Over-tightening is the most common mistake with short threaded pins.
- Test the joint: Gently wiggle the connected parts to confirm the pin holds them firmly. If there is play, the pin may be too short for the stack. Disassemble and use a longer pin.
Product facts
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Threaded pin M4x4: The eitech Threaded Pin M4x4 is a small threaded pin identified by its M4x4 size designation. It is listed under the eitech brand and carries the Manufaktur tag. The Standard variant is identified by SKU code 01381. Knowing the exact size (M4 thread, 4 mm length) helps you select the right fastener for thin connections without wasting time on trial and error.
Threaded pin M4x4