Air compressor fittings - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Nima** · 12-19-2014, 06:57 PM

Hi:

I am very confused about these fittings,confused: I thought there are only two different types: automotive and industrial but it seems I have a third or even fourth kind in my pile! (beside being male or female)
Would you ID the fittings in the picture for me?
Also, does the color of the fittings and/or quick connect means anything? I believe they come in gold/brass and silver?
Thanks

powerdriver 1958 · 12-19-2014, 07:26 PM

The one with the red on it is the most popular to my area and are know as the type d . I use them because nearly everyone keeps the couplers and fittings in stock (Even walmart)

Sillyoldman · 12-20-2014, 01:49 PM

I have both red & yellow ones. I have to swap fittings on occasion. Some day I'll inventory what I need and start over with one type. Leaky fittings drive me crazy so I'd be up for some advice in purchasing new ones.

donut · 12-20-2014, 10:53 PM

I believe most (if not all) of mine are also the red ones. I usually keep a few extras in the toolbox because they do wear out and leak air.
Drives me bonkers when I'm working on something and there's an air leak near by.
Don't really have any advise as both the male and female ends I've had wear out. Brass or steel, didn't seem to matter. Did pick up a couple Prevost female ends off the MAC truck, they are quite nice and a few around the shop are 5+ years old.

http://www.amazon.com/Prevost-PVOIRC061201-Regular...

**Nima** · 12-21-2014, 01:14 AM

I believe the red one is the "industry" one and the yellow one is the "automotive". I just don't know what the other two are.
I am thinking to just go all "industry" one with universal quick connects to get rid of my confusion.

donut · 12-21-2014, 10:05 AM

That was my choice, and like powerdriver 1958 mentioned, available everywhere. Auto stores, box lumber yards, Wal-mart, really wouldn't surprise me if 7-11 had some... ok, might be a stretch, but you get the idea.

clinebarger · 12-21-2014, 08:21 PM

This should help...https://miltonindustries.com/uploads...alog_Pg_35.pdf

I use Milton "M" style, The red one in the pic.

ka_jd7and1 · 12-22-2014, 11:27 AM

There are "universal" couplers that will accept both the industrial and automotive fittings. Lowes carries them, among other places.

I put the universal couplers on all my hoses and compressor, so no matter what end the hose or tool has, it will connect. Makes it a lot easier than trying to swap fittings on a tool you borrowed, or fumbling through your toolbox looking for the right one.

BossHogg69 · 12-22-2014, 08:44 PM

Quote:

Originally Posted by clinebarger

This should help...https://miltonindustries.com/uploads...alog_Pg_35.pdf

I use Milton "M" style, The red one in the pic.

Thanks for posting that handy little link!

**Nima** · 12-22-2014, 08:57 PM

Quote:

Originally Posted by clinebarger

This should help...https://miltonindustries.com/uploads...alog_Pg_35.pdf

I use Milton "M" style, The red one in the pic.

Very helpful. Thanks,

**truckdude239** · 12-24-2014, 10:17 PM

I use the yellow one on the left at work with push button quick release chucks. They dont leak a bit!!

powerdriver 1958 · 12-24-2014, 10:21 PM

Type d from here is the milton m lol

jetmech85 · 01-06-2015, 04:17 PM

Usually the leaky couplers are caused by the rubber gasket in the female part of the coupler being worn. I used to know a guy that called on tire shops selling weights, stems, and also sold repair gaskets for those couplers. He also said you could take the couplers apart and turn the gasket over and get more life out of them.

Sub-versive · 01-19-2015, 12:50 AM

Quote:

Originally Posted by jetmech85

Usually the leaky couplers are caused by the rubber gasket in the female part of the coupler being worn. I used to know a guy that called on tire shops selling weights, stems, and also sold repair gaskets for those couplers. He also said you could take the couplers apart and turn the gasket over and get more life out of them.

Um, I would have to disagree. Most of the failures, air leaks, that I have seen, come from damaged internals, not a gasket. I have not seen a method to take them apart, and why bother, they are inexpensive.
The universal female connectors do fail faster, but definitely easier to use with any male fitting.

jetmech85 · 01-19-2015, 01:06 AM

So you have never taken one apart? You know that that stuff inside there was put in there some how. I agree that most people just replace them for a few dollars but a repair gasket is only a few cents and if you simply flip the gasket over and use the side that is not worn then it is a free fix. If you have a shop with dozens of couplings it could add up over time. Besides some people prefer to fix rather than replace. The internals you speak of include a rubber gasket.

**Nima** · 01-19-2015, 09:47 PM

Quote:

Originally Posted by jetmech85

So you have never taken one apart? You know that that stuff inside there was put in there some how. I agree that most people just replace them for a few dollars but a repair gasket is only a few cents and if you simply flip the gasket over and use the side that is not worn then it is a free fix. If you have a shop with dozens of couplings it could add up over time. Besides some people prefer to fix rather than replace. The internals you speak of include a rubber gasket.

That would be nice if you could post some pictures and instruction as to how to take these fitting apart and flip the gasket. Money is one thing and the joy of "fixing" is another thing.

12-19-2014, 06:57 PM	#1
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,171	Air compressor fittings Hi: I am very confused about these fittings,confused: I thought there are only two different types: automotive and industrial but it seems I have a third or even fourth kind in my pile! (beside being male or female) Would you ID the fittings in the picture for me? Also, does the color of the fittings and/or quick connect means anything? I believe they come in gold/brass and silver? Thanks Attached Images __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner

12-19-2014, 07:26 PM	#2
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: Air compressor fittings The one with the red on it is the most popular to my area and are know as the type d . I use them because nearly everyone keeps the couplers and fittings in stock (Even walmart)

12-20-2014, 01:49 PM	#3
Sillyoldman #16876 Join Date: Apr 2005 Location: Auburn WA Posts: 12,266	Re: Air compressor fittings I have both red & yellow ones. I have to swap fittings on occasion. Some day I'll inventory what I need and start over with one type. Leaky fittings drive me crazy so I'd be up for some advice in purchasing new ones. __________________ Posted via Stationary Device '71 Custom Deluxe C-20 402. '67 Buick Special 455. '49 Plymouth Special Deluxe. *"I love that old car smell"* *Some people are like Slinkies... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.*

12-20-2014, 10:53 PM	#4
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: Air compressor fittings I believe most (if not all) of mine are also the red ones. I usually keep a few extras in the toolbox because they do wear out and leak air. Drives me bonkers when I'm working on something and there's an air leak near by. Don't really have any advise as both the male and female ends I've had wear out. Brass or steel, didn't seem to matter. Did pick up a couple Prevost female ends off the MAC truck, they are quite nice and a few around the shop are 5+ years old. http://www.amazon.com/Prevost-PVOIRC061201-Regular... __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

12-21-2014, 01:14 AM	#5
Nima Blue 67 Join Date: Apr 2004 Location: Western WA Posts: 1,171	Re: Air compressor fittings I believe the red one is the "industry" one and the yellow one is the "automotive". I just don't know what the other two are. I am thinking to just go all "industry" one with universal quick connects to get rid of my confusion. __________________ 1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner

12-21-2014, 10:05 AM	#6
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: Air compressor fittings That was my choice, and like powerdriver 1958 mentioned, available everywhere. Auto stores, box lumber yards, Wal-mart, really wouldn't surprise me if 7-11 had some... ok, might be a stretch, but you get the idea. __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

12-21-2014, 08:21 PM	#7
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: Air compressor fittings This should help...https://miltonindustries.com/uploads...alog_Pg_35.pdf I use Milton "M" style, The red one in the pic.

12-22-2014, 11:27 AM	#8
ka_jd7and1 is a fungineer Join Date: Jan 2009 Location: Bakersfield, CA Posts: 795	Re: Air compressor fittings There are "universal" couplers that will accept both the industrial and automotive fittings. Lowes carries them, among other places. I put the universal couplers on all my hoses and compressor, so no matter what end the hose or tool has, it will connect. Makes it a lot easier than trying to swap fittings on a tool you borrowed, or fumbling through your toolbox looking for the right one. __________________ 2003 S10, 2.2 auto- the daily driver, currently with a 2"/2" drop and some minor engine bolt-ons 1978 Impala 2-door, race 350/T350 - the new race car, in progress 1968 Chevy C10 longbed- 3/5 drop, currently undergoing a heart transplant

12-24-2014, 10:17 PM	#11
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: Air compressor fittings I use the yellow one on the left at work with push button quick release chucks. They dont leak a bit!! __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

12-24-2014, 10:21 PM	#12
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: Air compressor fittings Type d from here is the milton m lol

01-06-2015, 04:17 PM	#13
jetmech85 Registered User Join Date: Sep 2014 Location: Texas Posts: 215	Re: Air compressor fittings Usually the leaky couplers are caused by the rubber gasket in the female part of the coupler being worn. I used to know a guy that called on tire shops selling weights, stems, and also sold repair gaskets for those couplers. He also said you could take the couplers apart and turn the gasket over and get more life out of them.

01-19-2015, 01:06 AM	#15
jetmech85 Registered User Join Date: Sep 2014 Location: Texas Posts: 215	Re: Air compressor fittings So you have never taken one apart? You know that that stuff inside there was put in there some how. I agree that most people just replace them for a few dollars but a repair gasket is only a few cents and if you simply flip the gasket over and use the side that is not worn then it is a free fix. If you have a shop with dozens of couplings it could add up over time. Besides some people prefer to fix rather than replace. The internals you speak of include a rubber gasket.



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