unjf threads...please help
unjf threads...please help
(OP)
could anybody tellme if there is such a thing as a unjf internal thread (nut) or does it just apply to bolts???
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unjf threads...please help
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RE: unjf threads...please help
"J" threads are made in both external and internal forms. The external thread has a much larger root radius than the corresponding UNC, UNR, UNK, or UNF threads. This radius is mandatory and its inspection is required, whereas no root radius is required on UNC, UNF, or UNEF threads. Since the larger root radius increases the minor diameter, a UNJF or UNJC fastener has a larger net tensile area than a corresponding UNF or UNC fastener. This root radius also gives a smaller stress concentration factor in the threaded section. Therefore, high-strength (180 ksi or more) bolts usually have "J" threads.
The source for the above:
http://www.tcnj.edu/~rgraham/barrett/manual1-B.htm
for some more info:
http://euler9.tripod.com/bolt-database/23.html
http://www.iowamidland.com/tech%20tips/Kennametal-Greenfield-IPG%20Technical%20Tips%20Program102102.htm
RE: unjf threads...please help
RE: unjf threads...please help
Also see thread174-103251...