Thread Types - Optimum OPTI turn TU 3008G Operating Manual

Img.4-32: Tap external thread
4.19

Thread types

Designation
ISO-thread
UNJ
Whitworth
ISO-trapezoid
thread
(one- and mul-
tiple-
threaded)
GB TU3008G
46
Img.4-33: Tap internal thread
Profile
Nut
Bolt
Nut
Bolt
Nut
Bolt
Nut
Bolt
Translation of original instruction
Code letter Short term (e. g.)
M M4x12
UN
UNC 1/4" - 20UNC -
2A
UNF
UNEF
0.250 - UNC - 2A
UNS
UNJ 1/4" - 20UNJ
B.S.W. 1/4" in. -20
B.S.W.
W
TR Tr 40 x 7
Tr 40 x 14 P7
Application
Operation
Version 1.1.6 - 2021-9-17