Notices
General Technical
Sponsored by:
Sponsored by: CARiD

Re threading screws

Thread Tools
 
Search this Thread
 
Old Apr 17, 2002 | 08:57 PM
  #1  
Hanslow's Avatar
Hanslow
Thread Starter
Scooby Regular
 
Joined: Mar 2001
Posts: 4,496
Likes: 0
From: Derbyshire
Question

Is it possible to rethread a screw from 1/8" NPT to 1/8" BSPT and if so, is it easy to do or better to take it somewhere that can do it for you?

If possible, how reliable would it be (quality wise), could I do it myself (with the right tools), or does anyone have any recommendations in the Notts area that could do it for me?

Reason being, I bought some thread adaptors for my gauge senders from Think Auto, but the senders themselves are too long and they hit the bottom of the adaptor before the threads meet. Never thought to check when I ordered online

Other options are to chop about 1/4" off the end of each sender (not sure if I can do this anyway), or order some new longer adaptors.

Re-threading seems the cheaper option if possible. I know the 1/8" NPT are tapered whereas the 1/8" BSPT are straight. There should be more metal on the NPT so in theory should be possible?

Cheers
Reply
Old Apr 17, 2002 | 09:49 PM
  #2  
Dave T-S's Avatar
Dave T-S
Scooby Regular
 
Joined: Aug 2000
Posts: 8,897
Likes: 4
From: Newmarket Suffolk
Exclamation

Don't try recutting the thread, it will wreck it!

They are totally different - the BSPT has 55 degree included angle thread, rounded crest and root radius, but most importantly the 1/8 National Pipe Taper is 27 threads per inch and the British Standard Pipe Taper is 28 threads per inch.
Reply
Old Apr 17, 2002 | 11:12 PM
  #3  
Hanslow's Avatar
Hanslow
Thread Starter
Scooby Regular
 
Joined: Mar 2001
Posts: 4,496
Likes: 0
From: Derbyshire
Wink

Thanks Dave, I'll not bother with that then

Looks like it's chopping of sender or new adaptors.....

Just waiting on emails now
Reply
Old Apr 18, 2002 | 09:27 AM
  #4  
David_Wallis's Avatar
David_Wallis
Scooby Regular
 
Joined: Nov 2001
Posts: 15,239
Likes: 1
From: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
Post

dont chop the sender whatever you do..

David
Reply
Old Apr 18, 2002 | 11:10 AM
  #5  
Hanslow's Avatar
Hanslow
Thread Starter
Scooby Regular
 
Joined: Mar 2001
Posts: 4,496
Likes: 0
From: Derbyshire
Wink

Thanks Dave (is there an echo in here )

Looks like I'm getting some new adaptors then

I've emailed Think Auto to see if I can get some custom ones made....just waiting on the reply now.

Thanks for the warnings guys
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
JimBowen
ICE
5
Jul 2, 2023 01:54 PM
KAS35RSTI
Subaru
27
Nov 4, 2021 07:12 PM
Frizzle-Dee
Essex Subaru Owners Club
13
Dec 1, 2015 09:37 AM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
Nov 18, 2015 07:03 AM
just me
ScoobyNet General
25
Oct 29, 2015 10:32 AM




All times are GMT +1. The time now is 12:17 PM.