Crary PRO - Bolt Torque

Stringer Trailer Owner’s/Parts Manual
32
PN:90806-00 R090114
SPECIFICATIONS
CHECKING BOLT TORQUE:
The table shown below is for reference purposes only and its use by anyone is entirely voluntary, unless otherwise
noted. Reliance on its contents for any purpose is at the sole risk of that person. Crary Co. is not responsible for any
loss claim or damage arising therefrom. In developing these tables, Crary has made a determined effort to present the
contents accurately.
Torque fi gures indicated are valid for non-
greased or non-oiled threads and heads
unless otherwise specifi ed. Therefore, do
not grease or oil bolts or cap screws unless
otherwise specifi ed in this manual. When
using locking elements, increase torque
values by 5%.
* Torque value for bolts and capscrews are
identifi ed by their head markings.
ENGLISH
BOLT DIAMETER
BOLT TORQUE *
SAE 2 SAE 5 SAE 8
N.m Ft-lb. N.m Ft-lb. N.m Ft-lb.
1/4” 7.5 5.5 11 8 16 12
5/16” 15 11 23 17 34 25
3/8” 27 20 41 30 61 45
7/16” 41 30 68 50 95 70
1/2” 68 50 102 75 149 110
9/16” 97 70 149 110 203 150
5/8” 122 90 203 150 312 230
3/4” 217 160 353 260 515 380
7/8” 230 170 542 400 814 600
1” 298 220 786 580 1220 900
1-1/8” 407 300 1085 800 1736 1280
1-1/4” 570 420 2631 1940 2468 1820
METRIC
BOLT DIAMETER
BOLT TORQUE *
4.8 8.8 10.9 12.9
N.m Ft-lb. N.m Ft-lb. N.m Ft-lb. N.m Ft-lb.
M3 0.50.4---- - -
M4 32.2---- - -
M5 54---- - -
M6 6 4.5 11 8.5 17 12 19 14.5
M8 15 11 28 20 40 30 47 35
M10 29 21 55 40 80 60 95 70
M12 50 37 95 70 140 105 165 120
M14 80 60 150 110 225 165 260 190
M16 125 92 240 175 350 255 400 300
M18 175 125 330 250 475 350 560 410
M20 240 180 475 350 675 500 800 580
M22 330 250 650 475 925 675 1075 800
M24 425 310 825 600 1150 850 1350 1000
M27 625 450 1200 875 1700 1250 2000 1500
SAE - 8
SAE - 2
A
SAE - 5
SAE
Grade
and
Head
Markings
BOLT DIAMETER
10.9
4.8
A
8.8
METRIC
Grade
and
Head
Markings
BOLT DIAMETER
12.9
4.8
8.8 10.9
12.9
8.3 BOLT TORQUE