Hydroulic Fitting Size
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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=175666
Printed Date: 21 Aug 2025 at 9:07pm
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Topic: Hydroulic Fitting Size
Posted By: bendts
Subject: Hydroulic Fitting Size
Date Posted: 02 Nov 2020 at 3:58pm
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I may just be confusing myself here. I got the 3/8 NPT & 1/2 NPT size... But what is the fitting size on the steel tube pressure/sump Flare fittings? Are they NPSM / NPTF connections?  ------------- 1960 D17 Gas # 28849 |
Replies:
Posted By: Kevingweq
Date Posted: 02 Nov 2020 at 5:47pm
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uploads/20157/inverted_flare_size_chart.png" rel="nofollow - uploads/20157/inverted_flare_size_chart.png That style fitting is called an inverted flare (think brake lines ) Be cautious on mixing and matching as there is some variations on flare angles (degrees) https://www.jiayuanfitting.com/info/sae-thread-inverted-flare-fitting-size-chart-44478469.html |
Posted By: steve(ill)
Date Posted: 02 Nov 2020 at 6:05pm
it is called a 3/8 or 1/2 inch TUBE FITTING.... inverted flare ------------- Like them all, but love the "B"s. |
Posted By: bendts
Date Posted: 02 Nov 2020 at 6:21pm
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That is one of the charts I was looking at. Are there any adaptors that will allow the connection of a standard Hyd Hose with either NPT or JIC fittings? I need to run a pressure hose back to a 3 spool control, and need to connect to the brass female that comes out of the pump. ------------- 1960 D17 Gas # 28849 |
Posted By: Arcs and Sparks
Date Posted: 02 Nov 2020 at 6:47pm
| As far as adapters go the options are endless. For a few of the options just search Northern Tool for hydraulic street elbows. You can adapt 3/8 NPT to tube, NPT back to NPT, NPT cross over to JIC etc. Most are available in male to male, male to female etc. If you want to go with a tube fitting that is almost impossible to have a leak from, you can go to industrial tube fittings. These are crush type double flare fittings rated up to incredible pressures. They are pricy but very simple to use. In that case search the options at Swagelok. These are just a few of the possibilities. |
Posted By: Jim.ME
Date Posted: 02 Nov 2020 at 6:55pm
| A shop that makes hoses, can make a hose with that type fitting on one or both ends, which ever you need. I've had hoses made with 90° inverted flare fittings to replace some tubes, like that one. |
Posted By: MACK
Date Posted: 02 Nov 2020 at 8:58pm
| Thank the world for the JIC fittings. MACK |
Posted By: Joe(TX)
Date Posted: 02 Nov 2020 at 10:30pm
Measure the OD of the tube. That will tell you the size of the inverted flare fitting. If it is 1/2 in. it will have a 3/4-18 thread on the nut. ------------- 1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A |
Posted By: bendts
Date Posted: 03 Nov 2020 at 6:18am
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OK, I see those fittings on deeper searches now. I figured there had to be something that would match up. Thanks ------------- 1960 D17 Gas # 28849 |