[5pcs] 4 Awg - 3/8 Stud, Copper Wire Lug, Ring Terminal, Battery Cable End, Cable Lug, Wire Connector by KeeRoarin

No problem inserting the correct size awg wire and soldering the lug onto the wire. I did use flux and had no problems with adhesion. Worked just fine. With they had a size between the 1/2” and 1/4” hole. I’m sure 3/8” or 5/16” would be the most popular for the hole size. I used the larger 1/2” hole and put a stainless washer over the lug so it could be secured.

Great copper wire ring terminals, I am using for a high power go kart build with 4awg wires. Perfectly sized, fit my 4awg wire perfectly and took solder without any complaints. Would recommend, as I am using 5 pcs just for one project in a brushless controller setup. Thick terminal rings, not flimsy at all.

I ordered the 4AWG 5/16 terminals and when I first received them I thought I had the wrong gauge. They appear much larger than some other existing 4awg terminals I have. Upon further inspection, I think theyre actually better quality. Using a micrometer, I measured the same internal diameter as my others (about 7.5mm), and this one is actually a little more round. I think 2 things make it look larger. The first is it has a flared end where the wire goes in, and the second is that it fully encloses the wire. The flared end is is good to help you insert the wire, but on the other hand it could be harder to crimp flush with your wire. This terminal is also thicker than my others (2mm). Additionally, when the wire is fully inserted, it will not stick out the other side as theres no opening opposite the entry; it is fully enclosed. Overall, this seems to be a good quality terminal.

Exact size I wanted

I used these to rewire my travel trailer. They worked very well, perfect size, and held up perfectly. I compared these to lug connectors to ones I bought at Napa and these are the same (if not better) quality.

These are well made terminal lugs. I also did a comparison to the local store, these are cheaper. I did get a size a little bigger than I intended. I had to look up diy methods of crimping them to my 2000 Mustang battery wires. I ended up squeezed it between a C-clamp and two bolts, then used shrink tubing to finish it off.

I wanted to try these to create a grounding loop for my pool. I wanted to attach them to the metal frame of the pool. Theyre actually a bit bigger than what I needed, but I plan on doubling the 8 awg wire before putting it in. Pros: High quality Durable Easy to crimp Strong enough to support high voltage (for battery applications) Affordable Cons: None that I can think of. Overall, I am happy with these. They are exactly as expected, and Id recommend.

I got the 6 gauge 5/16(M8) lugs. Im using these on 4 gauge WindyNation wire. I found out that you cant match wire and lugs using gauge alone. The actual decimal diameter of a manufacturers gauge of wire varies a lot depending on the stranding, and bunching of those strands. Lug manufacturers tend to go larger with their ID to accommodate more wire designs. To get the best connection, you want the wire to fit snugly in the lug prior to crimping. If its way loose, your crimp will look bad and the connection will likely be poor. I always match the OD of the bare wire to the ID of the lug, and use gauge just as a loose reference. These lugs are about average in thickness. I measured these at .060. I have others that are .075, and I prefer that thickness. However, these are wider. That extra width allows more contact surface on my bus bars, battery terminals, etc. I think the extra width, and therefore extra contact area, is more important. The terminals fit my wire perfectly and crimp nicely. It would be nice if they came with heat shrink tubing, but theyre otherwise just about perfect. I recently also got the 1 Awg terminals and had the same great experience. The copper was thick enough, and the terminal itself was wide. These are well made terminals, and they were perfect for my needs once again.

Fixed my ground that had the old bracket snap off. Works perfect.

These are a nice set of 10 lug connectors - on par with some others i’ve had before. I have a crimper, and these work well with them. Decent quality. Very nice.