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Owings, Maryland 38.6856 N 76.6752 W | I have a pair of cylinders that have supposedly 9/16-18 UNF ORB ports. OK the 9/16-18 seems like a odd size, to me anyway. UNF, ok so it fine threaded, ORB, so it is a o-ring fitting.
Question is,,,,,, when I am shopping on e-bay for fittings and hoses etc. why am I not able to find anything compatible ? Maybe the 9/16" is really a 1/4" or 3/8" fitting with fine thread ? no. I also noticed that alot of the fitting are marked as #6, #8 and so on. Is 9/16-18 actually a hydraulic fitting size ? almost sounds like a bolt thread.
If you could just shed a little light on the subject it will be greatly appreciated, Thanks guys !!!!!!!
Hope I did a good job with my grammer and spelling !!!!!!!! |
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Owings, Maryland 38.6856 N 76.6752 W | Just found a handy little chart, will try to attach for others !!!!!
SAE J514 Straight Thread O-Ring Boss (ORB)
Recommended by the NFPA for optimal leakage control in medium and high pressure hydraulic systems. The male fitting has a straight thread and O-ring. The female port has a straight thread, a machined surface (minimum spotface) and a chamfer to accept the O-ring. The seal take place by compressing the O-ring in the chamfer. The threads hold the connection mechanically.
Inch Size Dash Size Nominal Thread Size Male Thread OD Female Thread ID
1/8 -02 5/16-24 5/16" (.31) 9/32" (.27)
3/16 -03 3/8-24 3/8" (.38) 11/32" (.34)
1/4 -04 7/16-20 7/16" (.44) 13/32" (.39)
5/16 -05 1/2-20 1/2" (.50) 15/32" (.45)
3/8 -06 9/16-18 9/16" (.56) 17/32" (.51)
1/2 -08 3/4-16 3/4" (.75) 11/16" (.69)
5/8 -10 7/8-14 7/8" (.88) 13/16" (.81)
3/4 -12 1 1/16-12 1 1/16" (1.06) 1" (.98)
7/8 -14 1 3/16-12 1 3/16" (1.19) 1 1/8" (1.10)
1 -16 1 5/16-12 1 5/16" (1.31) 1 1/4" (1.23)
1 1/4 -20 1 5/8-12 1 5/8" (1.63) 1 9/16 (1.54)
1 1/2 -24 1 7/8-12 1 7/8" (1.88) 1 13/16" (1.79)
2 -32 2 1/2-12 2 1/2-12" (2.50) 2 7/16" (2.42)
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| That is a 3/8 or #6 hydraulic size. Try this link http://www.discounthydraulichose.com/category_s/55.htm for size charts. I get many hydraulic fittings from NAPA, easy to get and not too expensive. |
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Brazilton KS | You've already found it.
Yes, it is a bolt thread. You can build fittings out of fine thread bolts when in a pinch. |
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NW Washington | FWIW the "dash" size number used for hydraulics is the size of the tube/hose/fitting in 16th of an inch. Therefore a #6 is 6/16" or3/8" and a #16 is 16/16 or 1" and so forth. |
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| O-ring fittings are convenient and effective, but are sometimes hard to find in remote locations. You may want to consider port adapters that would convert your #6 ports to 3/8" fnpt (female pipe threads) and this may make your fitting choices much greater and easier to access. |
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Owings, Maryland 38.6856 N 76.6752 W | Shopping e-bay at this time and that is pretty much what I have come up with, need to transition to another type from the ports, happened to find 10 #6 ORB X 3/8" FNPT's,,,,,, Thats the luck !!!!!!! |
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Hydraulic hose/fitting sizes ??????
