ASME Y14.6 Thread Call out

[marshell]

I am curious as to how many follow the recomendation of ASME Y14.6 Section 3.2 Thread Specification, and list the actual controlling organization and thread standard to be used? I read teh paragraph, and I get the sense that they wanted to make it a requirement but got a lot of pushback to not require it. I do not see it shown with the organization in any subsequent examples.

Here is the wording so people do not have to go searchign for it.

3.2 Thread Specification
In the U.S. the name and number of the controlling
thread standard is frequently omitted from the drawing.
Reference is made instead to the designation symbols
of the standard, such as series symbols and class
symbols. To avoid misunderstanding, it is recommended
that the controlling organization and thread standard
be specified or otherwise referenced on the drawing.
Examples follow:
1⁄4-20 UNC-2A, ASME B1.1
.250–28 UNJF-3B, ASME B1.15
M6x1-5H6H (21), ASME B1.13M

We are contemplating if we should list the standards or not, and I am wanting to gather information from both sides.

Thanks in advance

 

[powerhound]

My opinion is that you should not have to specify a standard. I've never worked to a print where the standard is specified on thread callouts. That doesn't mean that it doesn't or shouldn't exist, I've just never seen it.

John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II

 

[drawoh]

marshell,

Is there some other standards organization out there defining 1/4-20UNC threads?

--
JHG

 

[marshell]

Actually, yes I believe there is. Both ASME B1.1 and FED-STD-H28/2 cover the defenition for UN threads. How much overlap, and if there are any differences, I am not sure of, as there is a lot of charts and data in both.

 

[KENAT]

We specifically list the relevant thread specification in our notes due to section of Y14.6 the OP cites.

As to other standards for UNC threads, yes there are other standards that define them. Certainly the British have their version

http://shop.bsigroup.com/ProductDetail/?pid=000000000000065356

though it is officially withdrawn.

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[CheckerHater]

Certainly the British have their version though it is officially withdrawn.

More like replaced by ISO 263