Forum sponsored by:

What sort of thread is 1/4- 32UNS -2A?

Search for: in Thread Title in

Steve Withnell	17/05/2015 22:14:45
858 forum posts 215 photos	Is this normally referred to as 1/4 - 32 UNEF? 2A appears to be the thread tolerance. Steve
Tony Brazier	17/05/2015 22:36:47
2 forum posts	Hi that the same as glow plug thread for glow engines. Tony
Enough!	17/05/2015 22:45:25
1719 forum posts 1 photos	UN standards are: UNC - coarse UNF - fine UNEF - extra fine UNS - special (pitches not covered by the other categories) UNR - must have root radius 1/4 - 32 is specified in the UNEF category. I don't know why it would be described as UNS. Thread classes are 1A/2A/3A and 1B/2B/3B the number being the fit (1=loose to 3=close). A is used for external threads; B for internal
Steve Withnell	18/05/2015 20:27:06
858 forum posts 215 photos	Posted by Tony Brazier on 17/05/2015 22:36:47: Hi that the same as glow plug thread for glow engines. Tony Thanks for that - I must have one in the box then! Steve
Steve Withnell	20/05/2015 18:03:13
858 forum posts 215 photos	Hmm the nuts that I have which are specified as 1/4- 32UNS -2A, don't fit the enya glow plugs I have. The pitch is off just enough so the nuts don't run on to the plug thread. Don't worry, I'm not intending to fit nuts to my plugs, it was just an easy way to test Tony's point above. Steve

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts

hemingway ball turner
04/07/2025 14:40:26
*Oct 2023: FORUM MIGRATION TIMELINE*
05/10/2023 07:57:11
Making ER11 collet chuck
05/10/2023 07:56:24
What did you do today? 2023
05/10/2023 07:25:01
Orrery
05/10/2023 06:00:41
Wera hand-tools
05/10/2023 05:47:07
New member
05/10/2023 04:40:11
Problems with external pot on at1 vfd
05/10/2023 00:06:32
Drain plug
04/10/2023 23:36:17
digi phase converter for 10 machines.....
04/10/2023 23:13:48
More Latest Posts...
View All Topics

Support Our Partners

Shopping Partners

Subscription Offer

Latest "For Sale" Ads

Reeves** - Rebuilt Royal Scot by Martin Evans
by John Broughton
£300.00
BRITANNIA 5" GAUGE James Perrier
by Jon Seabright 1
£2,500.00
Drill Grinder - for restoration
by Nigel Graham 2
£0.00
WARCO WM18 MILLING MACHINE
by Alex Chudley
£1,200.00
MYFORD SUPER 7 LATHE
by Alex Chudley
£2,000.00
More "For Sale" Ads...

Latest "Wanted" Ads

D1-3 backplate
by Michael Horley
Price Not Specified
fixed steady for a Colchester bantam mark1 800
by George Jervis
Price Not Specified
lbsc pansy
by JACK SIDEBOTHAM
Price Not Specified
Pratt Burnerd multifit chuck key.
by Tim Riome
Price Not Specified
BANDSAW BLADE WELDER
by HUGH
Price Not Specified
More "Wanted" Ads...

Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues