What is this pin crimped on stranded wire called. - Page 1
Forum section: electronics / projects

author: Cicada
author_rank: Regular Contributor
timestamp: January 26, 2023, 11:28:40 am
content: HiPlease look at the picture attached. What is this pin/connector called and where can one buy it?It is crimped onto stranded wire with a gauge I guess of ~ 1mm square. Might be more, I will get the exact gauge later.And what is the significance of the coloured bands on the part of the pin where one crimp. Does it indicate mating pin diameter and/or gauge of wire that the pin can be crimped on?This pin almost look like the pins you can insert in 32 pin or 50 pin circular mil connectors. I do have some of the mil connector pins but their mating diameter = 1mm.ThanksCicada

author: robert.rozee
author_rank: Frequent Contributor
timestamp: January 26, 2023, 12:40:51 pm
content: these look very much like the pins used with MIL Spec circular connectors. see:https://nz.rs-online.com/web/p/circular-connector-contacts/9098100and for the whole range:https://nz.rs-online.com/web/c/connectors/circular-connectors/circular-connector-contacts/also:https://nz.element14.com/deutsch/4160-204-1631l/contpin-01ah6094/dp/3104317?st=mil%20spec%20connector%20crimp%20pinand:https://nz.element14.com/itt-cannon/030-8588-000/crimp-pin-ca-b-size-12-12-14awg/dp/2072332cheers,rob :-)

author: SL4P
author_rank: Super Contributor
timestamp: January 27, 2023, 04:13:31 am
content: Be careful if you buy straight pins and try to bend them… depending on the pin material, they don’t like bending. (From experience)

author: Cicada
author_rank: Regular Contributor
timestamp: January 27, 2023, 01:42:53 pm
content: HiThanks for the helpThe stranded wire going into the pin is 18 AWG wire i.e. 1mm diameter.And the diameter of the pin is 1.6mmSo this one will work.https://za.rs-online.com/web/p/circular-connector-contacts/0372399I will have to bend the pins.Would still be great if some one can point me to the exact product.Cicada

author: MLXXXp
author_rank: Frequent Contributor
timestamp: January 27, 2023, 10:11:31 pm
content: Quote from: Cicada on January 27, 2023, 01:42:53 pmYou probably won't be able to bend those pins. They are made out of formed flat metal and are hollow.

author: MLXXXp
author_rank: Frequent Contributor
timestamp: January 27, 2023, 10:48:51 pm
content: Quote from: MLXXXp on January 27, 2023, 10:11:31 pmWhat you might be able to do with those pins is cut the tip part off and solder the stranded wire into the resulting hollow.

author: Bud
author_rank: Super Contributor
timestamp: January 27, 2023, 11:22:29 pm
content: Use straight pins and right angle soldered ( not crimped) wires.

author: robert.rozee
author_rank: Frequent Contributor
timestamp: January 28, 2023, 12:38:13 pm
content: if you want to bend it, you'll need to select amachinedpin that is NOT formed out of a flat piece of metal. for instance, like the one i linked to earlier:https://nz.rs-online.com/web/p/circular-connector-contacts/9098100there are an enormous number of variants available, both machined and formed from flat. the machined pins are generally quite a bit more expensive.you will also need to experiment with the 90 degree bend. youmayhave to heat up the pin with a blowtorch first to allow it to bend rather than break, and/or bend it around a round former to prevent the bend angle being too sharp. it all depends what sort of metal the pin has been machined out of.what you show in the photo at the start of this thread looks very much like some variety of regular (straight) machined pin, that has been bent later on.cheers,rob :-)

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: January 28, 2023, 03:44:13 pm
content: If I read your picture correctly, the colour bands are RED / VIOLET / ORANGE, which makes it a M39029/34-273 contact for the MIL-DTL-28748 connector series. As this is a rather hard to find part, I would suggest that you might consider using a M39029/31-228 from the MIL-C-26482 Series 1 type of circular connctors, which is rather ubiquitous and gives you about the same length for bending.Also, a fixture of some sort to achieve a proper end without damage to the contact would be advisable.The coloured bands indicate the so-called bin number of all contacts coming under MIL-C-39028.See, for example,here:https://dmctools.com/m39029-connector-and-contact-search/