PCB M5 screw terminal - where to buy - Page 1
Forum section: electronics / projects

author: gaminn
author_rank: Frequent Contributor
timestamp: December 20, 2023, 01:14:02 pm
content: Hi,I'm repairing a device with these PCB screw terminals, some are damaged. Do you know if they can be purchased somewhere? Didn't find them...

author: Limhes
author_rank: Contributor
timestamp: December 20, 2023, 02:19:14 pm
content: I like Keystone for this type of stuff, they might have a replacement:https://www.keyelco.com/category.cfm/keyelco/Screw-Terminals-Terminal-Blocks/id/476You can order their stuff via Digikey and others

author: coppercone2
author_rank: Super Contributor
timestamp: December 20, 2023, 05:11:24 pm
content: you can make one out of brass or copper maybe by cutting bending and threading.

author: coromonadalix
author_rank: Super Contributor
timestamp: December 20, 2023, 05:41:30 pm
content: same here keystone pops a lot, but you can find many pcb screw terminal,but haven't seen the one in "cross fashion/design ??" many many in square or rectangle ...maybe aliexpress alibaba?

author: TimNJ
author_rank: Super Contributor
timestamp: December 20, 2023, 05:51:21 pm
content: Are those...steel? Actual damage, or just rust damage?Probably wouldn't be too horrendous to make by hand with some brass stock and a tap if you have one, depending on how many you need to make.

author: coppercone2
author_rank: Super Contributor
timestamp: December 20, 2023, 05:53:24 pm
content: or restore it in HCl, tin it, retap the hole to m6

author: gaminn
author_rank: Frequent Contributor
timestamp: December 20, 2023, 06:09:54 pm
content: It is damaged thread and also the rust. It seems I have to DIY...

author: coppercone2
author_rank: Super Contributor
timestamp: December 20, 2023, 06:22:47 pm
content: Well it could have been plated steel I suppose. Dodgy as fuck.I don't know if they have steel connectors? weird. if its not steel, then boil it in vinegar for a while to clean it up, drill a bigger hole, tap it and replace the lug on the cable with bigger one. going to a M6 on that looks feasible.

author: langwadt
author_rank: Super Contributor
timestamp: December 20, 2023, 06:24:16 pm
content: Quote from: gaminn on December 20, 2023, 06:09:54 pmsomething like this won't fit?https://www.aliexpress.com/item/32994027708.html

author: coppercone2
author_rank: Super Contributor
timestamp: December 20, 2023, 06:31:06 pm
content: or you can take a piece of brass rod, cut a tapped segment, drill 4 feet, and braze smaller brass rods into there so it can sit in the PCB, and bolt it to that. by combining brass rods you can get any land pattern you want. Even better if you can machine it on a small mill, but its possible to do with a hacksaw, drill and torch, or even just soldering, if you have a deep bore solder joint and you solder it good with plumber flux on a hot plate or whatever it should be fine for even pretty high current levels (but silver braze would be better). just make sure you clean and grease it after wards, possibly silver plate.if you make your own, lap the connector top after you thread and clean it (sand paper + glass or lapping plate) and clean it again.

author: gaminn
author_rank: Frequent Contributor
timestamp: December 20, 2023, 07:48:20 pm
content: https://www.aliexpress.com/item/32994027708.htmlmaybe if I twist its leads a little. I'll give it a try, thanks.

author: EPAIII
author_rank: Super Contributor
timestamp: December 21, 2023, 08:11:34 am
content: How about Press Fit Nuts?https://www.mcmaster.com/products/nuts/press-fit-nuts~/Just drill a hole and press them in. Solder on the rear, foil side. Just don't get stainless - it is almost impossible to solder. Ask me how I know. Brass would be best, but plated steel would work.ORRivet Nuts?Drill a hole and Pop them on from the rear. Solder and you have an M5 stud sticking up on the front.https://www.mcmaster.com/products/nuts/rivet-nuts~/material~brass-1/I am sure there are other sources. You just need to know what to search for.

author: tooki
author_rank: Super Contributor
timestamp: December 23, 2023, 01:49:20 pm
content: Würth Electronics sells solder-in threaded inserts, both THT and pure SMD.

author: Jwillis
author_rank: Super Contributor
timestamp: December 24, 2023, 07:54:27 am
content: The closest I could find were these from Würth Electronics sold at digikeydigikey. It would need to have the four corner pins cut off but the others may fit the PCB slots. Not a optimal approach to have to modify something to fit, but sometimes we have no choice.