Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > Dockside Chat
Reload this Page >

What pipe slips OVER Standard 1in-14 thread. (male)?

Notices

What pipe slips OVER Standard 1in-14 thread. (male)?

Old 01-19-2019, 05:23 AM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Apr 2009
Location: Florida
Posts: 16,799
Question What pipe slips OVER Standard 1in-14 thread. (male)?

I need to slide aluminum pipe over a standard 1"-14 thread (male) pipe. It is actually a marine VHF antenna mount that is the standard 1"-14 thread.(male)... I am looking for aluminum. I currently do not have the actual mount so I can't put my caliper on it - but I'm trying to get an idea of what I need.

I believe the Schedule 40 1" will give me the tightest possible fit, but I'm not certain. I am not looking to thread the pipe - I'm looking to slip it over the 1"-14.

Does 40-1" look right?

Thanks,
Pete

OldPete is offline  
Old 01-19-2019, 05:42 AM
  #2  
Senior Member
 
Join Date: Oct 2018
Location: Southern NJ
Posts: 127
Default

There is a 1" x 8 UNC, a 1" x 12 UNF, a 1" pipe thread that is 11-1/2 Threads per inch.

I have never heard of a 1 x 14 thread before. There are lots and lots of weird threads that are specific to a particular industry that nobody else ever uses. What is this thing?
maintenanceguy is offline  
Old 01-19-2019, 05:42 AM
  #3  
Senior Member
 
Join Date: Jan 2006
Location: Sunny florida
Posts: 23,022
Default

Tough answer. Somewhere (size) they switch from OD to ID it seems. After 50 years I still don't know pipe sizes.
billinstuart is offline  
Old 01-19-2019, 05:47 AM
  #4  
Senior Member
 
Join Date: Oct 2018
Location: Southern NJ
Posts: 127
Default

Google nominal pipe sizes and you'll find charts of all the standard pipe schedules. But you'll need to know the OD of our thread first. Pipe is measured by ID - although it's really some size that's close to the given ID. Tubing is measured by OD and is true to size.
maintenanceguy is offline  
Old 01-19-2019, 05:50 AM
  #5  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Apr 2009
Location: Florida
Posts: 16,799
Default

Originally Posted by maintenanceguy View Post
There is a 1" x 8 UNC, a 1" x 12 UNF, a 1" pipe thread that is 11-1/2 Threads per inch.

I have never heard of a 1 x 14 thread before. There are lots and lots of weird threads that are specific to a particular industry that nobody else ever uses. What is this thing?
It is a VHF male threaded end.

It is actually this:




...and what we are looking to do is find aluminum schedule 40 (or 80, if it can happen) that will slide over that threaded fitting (the pipe will NOT be threaded).
OldPete is offline  
Old 01-19-2019, 05:52 AM
  #6  
Junior Member
 
Join Date: May 2017
Posts: 18
Default

1" sch40 is 1.315od x .133" wall , 1.049 id
Flatland fisher is offline  
Old 01-19-2019, 05:54 AM
  #7  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Apr 2009
Location: Florida
Posts: 16,799
Default

Originally Posted by Flatland fisher View Post
1" sch40 is 1.315od x .133" wall , 1.049 id
You have the spec for what that threaded 1"-14 thread is? I can't find drawings for any VHF male or female thread... and I don't have one to put my caliper on...
OldPete is offline  
Old 01-19-2019, 06:08 AM
  #8  
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Location: PA
Posts: 239
Default

Standard 3/4" NPT (National Pipe Thread) is 14 threads per inch and would be about 1" outside diameter, pipe is measured by the inside diameter.
dmartin is online now  
Old 01-19-2019, 06:14 AM
  #9  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Aug 2003
Location: On The Razors Edge
Posts: 9,936
Default

You can also spend a few minutes here:

https://www.mcmaster.com/standard-pipe-fittings

I had to get some odd SS pipe to extend some rubber playground ball mounts last year and McMaster was a big help.
Just1more is offline  
Old 01-19-2019, 06:17 AM
  #10  
Admirals Club Admiral's Club Member
 
Join Date: Aug 2011
Location: Carolina Beach/Charlotte/Lake Wylie
Posts: 1,338
Default

Looks like your pic is NPT rolled cut
steve a59 is online now  
Old 01-19-2019, 06:28 AM
  #11  
Senior Member
 
Join Date: Oct 2012
Location: Virginia Beach Va
Posts: 1,763
Default

I just measured an antenna mount at 0.964 and it's really lose in a 1" piece of pipe.
mfix is offline  
Old 01-19-2019, 06:40 AM
  #12  
Junior Member
 
Join Date: May 2017
Posts: 18
Default

Originally Posted by OldPete View Post
You have the spec for what that threaded 1"-14 thread is? I can't find drawings for any VHF male or female thread... and I don't have one to put my caliper on...
Sorry, I do not have that information right now. I don't deal with fittings much, just sell lots of structural and sheet product.
Flatland fisher is offline  
Old 01-19-2019, 06:52 AM
  #13  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Apr 2009
Location: Florida
Posts: 16,799
Thumbs up

Originally Posted by mfix View Post
I just measured an antenna mount at 0.964 and it's really lose in a 1" piece of pipe.
Ah! Ok. So you measured a male threaded VHF mount and you get .964" OD, correct?
OldPete is offline  
Old 01-19-2019, 06:54 AM
  #14  
Senior Member
 
Join Date: Jul 2013
Location: galveston,tx
Posts: 565
Default

maybe do a little reaming on the inside of a 1" pipe. use a flapper wheel on a drill motor if you don't have a rotary tool.
smooth move is offline  
Old 01-19-2019, 07:02 AM
  #15  
Senior Member
 
Join Date: Oct 2012
Location: Virginia Beach Va
Posts: 1,763
Default

Originally Posted by OldPete View Post
Ah! Ok. So you measured a male threaded VHF mount and you get .964" OD, correct?
That's correct.
mfix is offline  
Old 01-19-2019, 07:19 AM
  #16  
Senior Member
 
Join Date: Oct 2012
Location: Virginia Beach Va
Posts: 1,763
Default

A 3/4" NPT coupling screwed on to the mount.
mfix is offline  
Old 01-19-2019, 01:15 PM
  #17  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Apr 2009
Location: Florida
Posts: 16,799
Default

Terrific info guys. Thank you!
OldPete is offline  
Old 01-19-2019, 02:11 PM
  #18  
Senior MemberCaptains Club Member
 
Join Date: Mar 2005
Location: Boat,Town Cove, Cape Cod. Live south of Boston.
Posts: 1,448
Default

Originally Posted by billinstuart View Post
Tough answer. Somewhere (size) they switch from OD to ID it seems. After 50 years I still don't know pipe sizes.
12" and down measured by the ID, sched 40 pipe.
14" and up is measure by the OD.
PF-88 is offline  
Old 01-21-2019, 06:06 AM
  #19  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Apr 2009
Location: Florida
Posts: 16,799
Default

1" NOM. (1.32" OD X 0.18" WALL X 0.957" ID) ALUMINUM 6061-T6 PIPE SCHEDULE 80

Ok... I'm still waiting on the actual part so I can put eyeballs on the OD, but if mfix is spot-on, it would appear that with almost zero hassle some 1" schedule 80 will slip over and provide a nice bite.

The fitting is: .964
The ID of the pipe is .957

.0007 of an inch, I'd have to think that's a non-issue.

Thanks again for the help on this one.
OldPete is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread