Standard thread 3/4 -16 UNF

[rupeshpahwa]

I have a drawing which says to measure 3/4-16UNC-2A . I believe we do not have such call out in unified screw threads standard, it should be 3/4-16unf or 3,4-10unc.please suggest.

 

[SDETERS]

I would say 3/4-16 UNF it was probably a slip of the mouse and or keyboard. Been there done that one before. Do you have a cad file? Measure the hidden line and see if the minor match more of the 3/14 16 or the 3/4-10. Or look at the thread relief diameter. What makes sense at that diameter under the head of the screw.

 

[dgallup]

I'd ask your customer. Never try to second guess an error.

 

[SDETERS]

Good One never assume anything

 

[KENAT]

Ask your customer, however if in this case you can't, historically I've found the thread dia & pitch to be specified more accurately than the thread family because, well, 1/2 the people specifying them don't know the difference between a UN, UNF, UNC, UNEF, UNS...

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[looslib]

Kenat, you are being too kind with your "1/2 the people" comment. Maybe it should be 3/4 of the people.


"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[KENAT]

What can I say, I was feeling all warm & fuzzy.

Posting guidelines faq731-376

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(probably not aimed specifically at you)
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[juergenwt]

Go here:

http://www.engineersedge.com/screw_threads_chart.htm