M10 Unloader line nut search (Solved)
I'm now writing this as a reference for anyone in the future maybe searching and trying to find this unloader line or exhaust tube or a similar. There's pretty minimal info in a search.
So this is an M10 or M10-1.0 SAE flare on the tank check valve. It's smaller than 1/4" flare but larger than 3/16" flare. The outside of threads measures 10.36mm.
But now where to find an M10-1.0 SAE line flare nut
It's on an ALL Power APC4005 Twin stack Contractor Style air compressor. I believe also sold under Sears, Lowes, Strikeforce and others somewhere around early 2000's or so. They don't sell compressors anymore and only a few random parts left from later models. I think they may have closed up. Emails don't go through phone numbers don't work. This one I believe was sold at Advance Auto Parts from what I could find in searches.
I need to add the unloader line from this tank valve up to the switch since it's not there anymore. I bought the thing for a whole $10...but guy didn't know much about it. Thought if ya put a cap on there it would fill. He stuck his finger over it and it started filling. The pressure switch end seems to be a fairly common M10-1.0 inverted flare that I can work with.
This is actually kind of a nice design unit with wheels and a moving handle. Otherwise it's nothing special but decent output at 4.2CFM u/90PSI. I knew the frame/tanks was worth it with the design etc. Or the motor runs so would be a good replacement.
Solution
Took a while in researching but on Amazon I found a "TopHomer Air Compressor Exhaust Tube Aluminum Plated Copper, 6mm Diameter, 1-Way Flow, 470mm / 18.5in Central Pneumatic Compressor Parts (470mm / 18.5in)" That fit well has M10 on the SAE flare end then has 2 extra nuts for the other end that are the M10 with a 12mm wrench nut, then I believe an M12 nut that is a 14mm wrench nut. The line is 1/4" and copper coated alum.
There's also a "UXCELL 10mm Hex Nut 200mm Length Air Compressor Exhaust Tube Copper" or 8" long on Amazon for about $8. It is a 1/4" line and has the correct nuts on each end. It just ended up being a bit too short. But I can work with that. I need about 3" longer or 11" 280mm. The nuts are the harder part to find. The key search terms I think are Air Compressor Exhaust Tube or M10 Pilot valve line, in a search they show on Alibaba and all over in links. Just have to find the M10 and length. But I have brake tube I can use. Or just make a new flared end section to add to the valve end of a union, swap the nut and it's done.
I talked to a service shop and they suggested Makita compressors are normally metric. I also found the same looking M10 check valve listed on Ebay for Central Pneumatic. So maybe some searching for the line for one of those can yield some info if one is searching. They only offer and service a small brand list. They can't really source individual parts very well without part numbers. We agreed it's likely so ya can't just put random parts on.