do you know a source, UNJF-3B
do you know a source, UNJF-3B
(OP)
I am looking for a tap, 1.000-12UNJF-3B, but with .005/.007 root radius.
you may say, for female thread, there is no root radius requirement from mil-s-8879, but as I know there is a trend towards that.
so, any place to get a special tap, if so called?
thanks.
you may say, for female thread, there is no root radius requirement from mil-s-8879, but as I know there is a trend towards that.
so, any place to get a special tap, if so called?
thanks.





RE: do you know a source, UNJF-3B
RE: do you know a source, UNJF-3B
RE: do you know a source, UNJF-3B
Why did you state that "is no longer correct". Is that due to a specific customer requirement?
RE: do you know a source, UNJF-3B
'In general' MIL-S-8879 was replaced by AS8879.
AS8879 P/N example and Figures 1 [ext thrd], 2 [int thrd] and 3 [int-ext thrds assembled together, tolerance study] clearly show controlled root radii for A [ext] and B [int] type threads.
REFs
SAE AIR5926 White Paper to Support Supersession of MIL-S-8879C With AS8879C
FAA AC21-41A Replacing MIL-S-8879C With SAE AS8879
Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true.
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o Unfortunately, in science what You 'believe' is irrelevant. ["Orion"]
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RE: do you know a source, UNJF-3B
RE: do you know a source, UNJF-3B
using standard thread tap, you will get flat root.
thanks to all.
RE: do you know a source, UNJF-3B
Also, rather than using a tap to produce this thread, I'd suggest milling the internal thread if possible. Milling the 1.000" cl.3 internal thread will give a better result than using a tap.
RE: do you know a source, UNJF-3B
thanks.