Securpak Machine Screw & Nut ZP M4 x 12, Pack of 10

This Securpak pack of M4 nuts and bolts holds ten zinc plated M4 x 12mm machine screws, each with a matching nut. They are for fastening thin parts together where a threaded fixing and nut are needed rather than a wood screw.

Key features

• M4 thread, 12mm long
• Zinc plated (ZP)
• Supplied with nuts
• Pack of 10

Specifications

Which one do I need?

M4 refers to the thread diameter, so the nut and screw must both be M4. For the length, add up the thickness of all the parts being clamped, then allow enough extra thread for the nut to engage fully. A 12mm screw is a short length, so it suits thin parts. If the screw is too short to show a full thread beyond the nut, choose a longer size.

How to use

1. Line up the holes in the parts you are joining; they need to be large enough for an M4 thread.
2. Pass the machine screw through from the side you want the head to show.
3. Thread the nut on by hand to avoid cross-threading.
4. Tighten with a screwdriver while holding the nut with a spanner or pliers.
5. Do not overtighten on thin or soft materials, as this can distort the parts or strip the thread.

FAQs

What size are these M4 nuts and bolts?

They are M4 x 12mm machine screws with nuts.

How many come in a pack?

There are ten screws, each with a nut.

What finish do they have?

They are zinc plated, shown as ZP in the product name.