Operation
Version 1.0.2 - 2020-07-20
45
Translation of original instruction
TM3310 | TM3310D
EN
T
M
3310_
GB_4
.f
m
4.18
Thread types
Designation
Profile
Code letter
Short term (e. g.)
Application
ISO-threads
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
ring
UNJ
UNJ
1/4" - 20UNJ
Aircraft i
ndustry a
nd
a
erospa
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
ch
se
al
ISO trapezoi-
dal thread
(one- and mul-
tiple- threa-
ded)
TR
Tr 40 x 7
Tr 40 x 14 P7
Mo
tio
n th
read,
L
ead
ing spi
ndle
a
nd tra
nsport sp
ind
le
Round thread
RD
RD DIN 405
Fi
tting
s a
nd
fo
r
p
urpose
s
of th
e fi
re
b
rigad
e
Nut
Bolt
Nut
Bolt
Nut
Bolt
Nut
Bolt
Nut
Bolt
