STANDARD CHARTS AND TABLES
This manual provides dual dimensioning for most
specifications. U.S. standard units are specified first,
with metric (SI) units in parentheses. References
throughout the manual to standard torques or other
standard values will be to one of the following Charts
or Tables. For values not shown in any of the charts or
tables, standard conversion factors for most com-
monly used measurements are provided in TABLE
XIII, page A5-6.
INDEX OF TABLES
TABLE I . . . . Standard Torque Chart (SAE) A5-1
TABLE II Standard Torque, 12-Point, Grade 9 A5-2
TABLE III . Standard Metric Assembly Torque A5-2
TABLE IV . . . . JIC Swivel Nuts Torque Chart A5-3
TABLE V . . . . . . . Pipe Thread Torque Chart A5-3
TABLE VI . . . . . . . O-Ring Boss Torque Chart A5-3
TABLEVII . . . O-Ring Face Seal Torque Chart A5-3
TABLE VIII . Torque Conversions (ft.lbs – N.m) A5-4
TABLE IX . Torque Conversions (ft.lbs – kg.m) A5-4
TABLE X . Pressure Conversions (psi – kPa) A5-4
TABLE XI . Pressure Conversions (psi – MPa) A5-4
TABLEXII . . . . . . . Temperature Conversions A5-5
TABLEXIII . . . Common Conversion Multipliers A5-6
EFFECT OF SPECIAL LUBRICANTS
On Fasteners And Standard Torque Values
Haulpak Division does NOT recommend the use of
special “friction-reducing” lubricants such as, “Copper
Coat”, “Never Seize”, and other similar products on the
threads of standard fasteners where “standard torque”
values are applied.
The use of special “friction-reducing” lubricants will
significantly alter the clamping force being applied to
fasteners during the tightening process. If special “fric-
tion-reducing” lubricants are used with the “Standard
Torque” values listed below in Table I (and most
Haulpak service manuals), excessive stress and
pos-
sible breakage of the fasteners may result.
Where Torque Tables specify “Lubricated Threads” for
the Standard Torque values listed, these standard
torque values are to be used with simple lithium
base chassis grease (multi-purpose EP NLGI) or a
rust- preventive grease (see list, page A5-2) on the
threads and seats, unless specified otherwise.
NOTE: Always be sure threads of fasteners and
tapped holes are free of burrs or other imperfections
before assembling.
Standard Torque values are not to be used when
“Turn-of-the-Nut” tightening procedures are rec-
ommended.
CAP-
SCREW
THREAD
SIZE
TORQUE – GRADE 5 TORQUE – GRADE 8
CAPSCREW
THREAD
SIZE
TORQUE – GRADE 5 TORQUE – GRADE 8
ft. lbs. kg.m N.m ft. lbs. kg.m N.m ft. lbs. kg.m N.m ft. lbs. kg.m N.m
1/4–20 7 0.97 9.5 10 1.38 13.6 3/4–16 235 32.5 319 335 46.3 454
1/4–28 8 1.11 10.8 11 1.52 14.9 7/8–9 350 48.4 475 500 69.2 678
5/16–18 15 2.07 20.3 21 2.90 28 7/8–14 375 51.9 508 530 73.3 719
5/16–24 16 2.21 22 22 3.04 30 1.0–8 525 72.6 712 750 103.7 1017
3/8–16 25 3.46 34 35 4.84 47 1.0–12 560 77.4 759 790 109.3 1071
3/8–24 30 4.15 41 40 5.5 54 1.0–14 570 78.8 773 800 110.6 1085
7/16–14 40 5.5 54 58 8.0 79 1 1/8–7 650 89.9 881 1050 145 1424
7/16–20 45 6.2 61 62 8.57 84 1 1/8–12 700 96.8 949 1140 158 1546
1/2–13 65 9 88 90 12.4 122 1 1/4–7 910 125.9 1234 1480 205 2007
1/2–20 70 9.7 95 95 13.1 129 1 1/4–12 975 134.8 1322 1580 219 2142
9/16–12 90 12.4 122 125 17.3 169 1 3/8–6 1200 166 1627 1940 268 2630
9/16–18 95 13.1 129 135 18.7 183 1 3/8–12 1310 181 1776 2120 293 2874
5/8–11 125 17.3 169 175 24.2 237 1 1/2–6 1580 219 2142 2560 354 3471
5/8–18 135 18.7 183 190 26.2 258 1 1/2–12 1700 235 2305 2770 383 3756
3/4–10 220 30.4 298 310 42.8 420
1 ft. lbs. = 0.138 kg.m = 1.356 N.m
TABLE I
STANDARD TORQUE CHART
SAE HEX HEAD CAPSCREW AND NUT ASSEMBLY
(LUBRICATED THREADS)
TOLERANCES ±10%
GRADE 5 GRADE 8
A05001 03/01 Standard Torque Charts and Tables A5-1
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