PS Magazine - FEBRUARY 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 243
FEBRUARY 1973
TORQUE FT-LBS
TORQUE FT±LBS
SCReW
NO DASHES
3 DASHES
DIAMETER
(SAE GRADE 2)
(SAE GRADE 5)
0
²
1/4³28
4´6
8µ1¶
·
¸²
7
5/16¹24
º´11
14µ»9
¼
½¾
3/8´24
15¹19
3¶µ35
i
J
º¿16µ2¶
23´28
44µ54
1/2µ2¶
34µ41
º3¹83
9/16´1À
4º´5º
1¶ºµ11º
Á/8´18
6º´ºº
15¹»63
3/4µ16
»»5µ125
268µ2º8
Ã/8µ14
1º8µ»88
424µ434
1´14
255µ265
585¹634
I
?Ä
1 1/4µ12
488µ498
1211´»26»
Å
1 1/2µ12
816µ826
2144¹2194
This chart is based on using clean, dry,
threads. Reduce torqUe by
ÆÇ
per cent
when engine oil iS used as a lubricant. If
new capscrews are used, reDuce torque
by
ÈÇ
Pr cent. Capscrews threaded into
aluminum may require a reduction in
torque of
ÉÇ
per
cent' Or more
unless
inserts are used.
·
-
±
²
³
TORQUe FT±LBS
6 DASHES
(SAe GRADe 8)
Ê
'
˵14
23µ28
4
46µ5»
Ì
6赼9
'"
,
113´123
Í
165´1º5
235µ245
41º¹42º
Î
663µ6º3
uo Ï Ð
Ë43´99Â
1963µ2¶»3
Ñ
1
35¶6´3556
SOCKET
SIZE
Ò
º/16
¸
1/2
Ó¿
9/16
5/8
3/4
»3/16
»5/16
» »/4
» 5/Ô6
1 1/2
» º/8
2 1/4
What you don±t do iS measure the head
and use that reading for the size. ²ome
Mechanics have BEn doing ³his and, of
course,
they
over-to´que and
cause
proµlems.
±
If you have to suµsti¶te (as you some·
times will) you can do it in only one
direction¸up. When a No.
Õ
capscrew is
called for and you don±t have it, you can
use a No.
Ö.
However, if a No.
Ö
is called
f¹r, that±s wºt you gotta use. Never go
down.
I
±
i
²·³
»ne o³her thing: ¼F you have nuts of
different thicknesSes, always
use the
thickest with No.
Ö
µolts. You need it be½
cause of the higher torque that these
µol¾s ³ake.
×Ø
¿Course, Some of ÀÁem are. »n±³u³her
Â1and, some of them are Noà ıs So look
real close. YouÅll always find a figure,
either No.
ÙÕÚ
or
ÛÖÜ
to clue you.
ONCE: 'Du
lnd TLiS
sAe F´GURµ.
Yo¶ c¸
W¹rKº»
t¼
1RQU±.
Back to Top Back to Top
