HELP! -Need a 5/16 pipe to 3/8 flare brass fitting.

[akintosyali]

I was at the boat toady reinstalling the hynautic steering pump (Crowell, old style). (Bill, I stopped by twice but you were not there. Do you take Sundays off??)

As I was tightening one of the tubes into the cylinder, the piece that connects the tube to the pump broke. I took it to HD and they said that they have never seen such a fitting. Duh!

It is 3/8 flare (on the tube end) and the side that goes into the pump is a 5/16 pipe thread.

I even looked at mcmaster.com and didn't see a comparable piece there. Any ideas??

 

[aquacraig@shaw.ca]

Any good mechanic has the tools to flare the pipe. It's not uncommon to have to cut and reflair copper tubing.

 

[GaryNW]

Are you sure you don't have 1/4 or 3/8 pipe threads? My specs(SAE) don't show a 5/16" size. What you describe is called a "half union" and should be readily available.
Gary

 

[TedZ]

5/16 OD tubing is 1/4" pipe ordinarily. Did you try a 1/4" fitting? 1/4" to 3/8" flare is very common...Home Depot kind or NAPA of thing. If you buy a flaring tool make sure you get one that double flares. Single flares crack with vibration eventually. No steering and a pool of red is never any fun.

Ted

 

[yachtsmanbill]

You mustve got a new job as a banker LOL (bankers hours!) We pulled out at around 12:30 yesterday and drove by BARBAROS with NO Akin.... again!! Other than Sunday, my usual hours are 0730 - 1530 MONDAY thru MONDAY
BTW... you left your cord plugged in again too!! ws

 

[yachtsmanbill]

Also... I probably have the fittings you need on board! ws

 

[Boatsb]

All the fittings on the Hynautic system are 1/4 NPT. You need to put flex between the copper and the pump and ram. What are you using for that last 2 feet? I used flex hose and connectors from the marine supplier. FYI the hose is pricey and the connectors are insane. I believe $10 each wholesale.

 

[akintosyali]

Sorry couldn't respond earlier - I was out of town for business.

I took the piece to HD, and they measured the pipe end to be 5/16. So I have a confirmed 3/8 flare on tube side and 5/16 pipe on the other.

 

[GaryNW]

There is no such thing as 5/16" pipe fittings. With pipe fittings, the nominal size is roughly the inside diameter. You no doubt are looking for 1/4" pipe size; the threads probably measure about 5/16" at the small end (they are tapered). So buy 1/4" pipe x 3/8" tubing half union and you will be in business. Your advisors are not plumbers.
Gary
ps: I've never managed to break one of these, even soft brass!

 

[captddis]

Sorry couldn't respond earlier - I was out of town for business.

I took the piece to HD, and they measured the pipe end to be 5/16. So I have a confirmed 3/8 flare on tube side and 5/16 pipe on the other.

Post a pic and we can help. Are you measuring pipe thread? If so 5/16 would be 1/8 NPT. If it is tubing, there is 5/16 tubing and hose but no 5/16 threaded pipe. I am sure the parts are common, just confusion over tubing size and pipe thread size and rigid pipe.they are measured differently.
Take what you have to a hydraulic shop and they will fix you up.

 

[akintosyali]

Took it to a hydraulic shop.. Actually, had to go through 3 different shops - and learned that the piep end is what is called a size #5. It is not 1/4, nor 3/8 not 5/16. The 3rd shop had a replacement part, so I was able to get it replaced.

 

[captddis]

That is a hydraulic straight thread that should use an o ring to seal, not a pipe thread.