abs Plastic Round Spacers Round Straight Tube Assortment Kit for M4 Screws OD 7mm ID 4.2mm

I often use spacers for my electronic projects and I prefer to use aluminum especially if they are needed to mount a stepper mottor or something similar. The problem is that I have to have a stack of them at hand and having a stack of aluminum spacers can be expensive. These are priced very well and I can use them for fitment so I can only buy the aluminum spacers I need and not just to have them laying around. If you use spacers when you build your prototypes or for light duty projects, these will serve you very well.

If you have switches or receptacles that aren't flush with the wall (so the cover plates keep cracking when you screw them in, or so there is a gap around your plugs/switch) this is your solution. There is a pretty wide assortment, so it should work out regardless of how big the recess is.

i was doing a lot of assembly of gear that used long 4mm machine threads. I needed to space the attachment these are perfect. lots of different lengths I am happy with them.

Not too sure what you would use the long spacers for, since wall plugs are usually not that recessed even when adding tile to the surrounding area. But you could cut them down and use them like the shorter ones I suppose. Nice collection though.

Worked fine for what they are. Liked the variety so I could find the right size without cutting one.

Not only do they come in a nifty and secure carrying case, they make it so that the new outlet isn't sunken into the wall behind the outlet cover. A pet peeve of mine and it just looks janky.

Bought to use on various projects. Have been handy to have. Recommended.

Now I have a lifetime supply. Worked just fine too!