OPTIMUM
M A S C H I N E N - G E R M A N Y
Operation
Version 1.0.1 dated 2015-05-27
Page 53
Original operating instructions
TU3008 | TU3008V
GB
4.18
Thread types
Designation
Profile
Code letter
Short term (e. g.)
Application
ISO-thread
M
UN
UNC
UNF
UNEF
UNS
M4x12
1/4" - 20UNC -
2A
0.250 - UNC - 2A
Mach
ine tool
s
and
g
enera
l
me
ch
ani
ca
l engi
nee
ri
ng
UNJ
UNJ
1/4" - 20UNJ
Aircraf
t in
dustry a
nd
aerosp
a
ce i
ndu
stry
Whitworth
B.S.W.
W
1/4" in. -20
B.S.W.
Cyli
ndrica
l thre
ads,
Pipe thread
s,
o
r
con
ical pi
pe thread
s
for thread
conn
ecti
ons whi
c
h
se
al
ISO-trapezoid
thread
(one- and mul-
tiple-
threaded)
TR
Tr 40 x 7
Tr 40 x 14 P7
Mo
tio
n
th
read,
L
ead
ing spi
ndle
a
nd tra
n
sport sp
ind
le
Round thread
RD
RD DIN 405
Fi
tt
ing
s
a
nd
fo
r
p
u
rpose
s
of th
e fi
re
b
rigad
e
Nut
Bolt
Nut
Bolt
Nut
Bolt
Nut
Bolt
Nut
Bolt
