Hilitchi Hilitchi 40-Pieces 2 3 4 5 Pin 16mm Thread Male Female Panel Metal Aviation Wire Wire Connector Plug Assortment Kit (2 Pin / 3 Pin / 4 Pin / 5Pin)

Needed a bunch of connectors with different number of pins. These worked perfect. Good price. Arrived on time.

The reviewer that gave these 1 star really annoyed me. I am a professional panel and systems designer. I work with various quality grades of parts every day and to compare these to professional Indy-Car connectors is quite frankly ridiculous. Lets be blunt here. Would I use these where human life or tens of thousands of dollars was at stake if it failed or where they were going to be pulled on and off regularly or where they are going to be subjected to serious extreme environmental conditions like under the hood of an Indy car - no I would not. However the high quality connector the reviewer who gave these 1 star mentioned cost my company $13 each for the panel mount and $8.75 each for the plugs when you buy them in quantities of 50 or more. That means on average a pair costs over $22. What the heck did he expect when a box of 16 pairs is being sold for $20? I needed an assortment of different pin counts to make a PLC test box that I can use with 5 different PLC vendor setups. To have a virtually identical test box for each setup would be very expensive but by making my own and using these connectors I can test over 25 different sensors on 5 different types of PLC with 1 test box. I purchased a mixed box of the 2 to 5 pin and a mixed box of the 6 to 10 pin, total cost $40. Had I used high grade connectors which I can get from work at cost just those connectors would have cost me in excess of $350. These connectors on my test box are unlikely to be plugged or unplugged more than once a week and the sensor items may not even be screwed together during the test so I couldn't care less if it was difficult and personally I find them very easy to mate up together and the quality is pretty good for the use I need them to do. Overall I think these are great value for money and work well for me for simple test box applications. See the pictures. For those of you who don't want them to spin during assembly then instead of using a round 16mm hole you can use a "double D" with a 15.4mm major diameter and 14.6mm across the flats. If you don't understand that last comment just cut 16mm round holes for them!

I hate soldering but other than that being a requirement, these are pretty solid. Using it for my rotary to connect into my co2 laser

Overall good, but the hollow post is too shallow and makes it difficult to solder

I thought it would be helpful if a sheet with the specs/ratings were included in the box - otherwise I have to check here if I have any doubts about current rating, or have to measure for size. This is a minor nit-pick - they are adequate for my purposes. There is another design issue that is a bit of an annoyance. The male fittings are panel mounted. You will note that there is a threaded portion that goes inside the panel, and one that goes outside, separated by a built in ring which is larger than the mounting hole. On every other electronic component I have ever used - toggle switches, pots, phone jacks, etc., the retaining nut goes on the outside of the panel. Generally there is only a single section of thread, and another nut inside the panel can be used to set the amount that protrudes outside. With the connectors being reviewed, the retaining nut must be inside the panel, otherwise there does not seem to be sufficient thread to screw on the female connector. This can make it very awkward to make your connections if you are working in a tight space. In particular, as designed, you must thread your connecting wires through the (internal to the panel) retaining nut before connecting them either to the connector itself or to whatever is feeding it. A single, continuously threaded portion with an additional nut in place of the separating ring would be more convenient. Alternatively, having a longer threaded portion on the external part so that the female connector could be attached even if you put the retaining nut on the outside. In either case you wouldn't have to thread your wires through the retaining nut.