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Appendix 19
Bolt Torque & Size Charts (Rev. 3/28/2007)
BOLT SIZE CHART
NOTE: Chart shows bolt thread sizes and corresponding head (wrench) sizes for standard SAE and metric bolts.
ABBREVIATIONS
AG ..............................................................Agriculture
ASABE.................... American Society of Agricultural &
Biological Engineers (formerly ASAE)
ASAE ....... American Society of Agricultural Engineers
ATF ............................... Automatic Transmission Fluid
BSPP.............................British Standard Pipe Parallel
BSPTM ................British Standard Pipe Tapered Male
CV.....................................................Constant Velocity
CCW..............................................Counter-Clockwise
CW...............................................................Clockwise
F ...................................................................... Female
FT ..............................................................Full Thread
GA .................................................................... Gauge
GR (5, etc.) ........................................... Grade (5, etc.)
HHCS ........................................Hex Head Cap Screw
HT........................................................... Heat-Treated
JIC .................Joint Industry Council 37° Degree Flare
LH.................................................................Left Hand
LT........................................................................... Left
m.........................................................................Meter
mm................................................................Millimeter
M.......................................................................... Male
MPa.........................................................Mega Pascal
N.......................................................................Newton
NC......................................................National Coarse
NF ...........................................................National Fine
NPSM.....................National Pipe Straight Mechanical
NPT.......................................... National Pipe Tapered
NPT SWF.........National Pipe Tapered Swivel Female
ORBM .......................................... O-Ring Boss - Male
P...........................................................................Pitch
PBY......................................................Power-Beyond
psi..........................................Pounds per Square Inch
PTO..................................................... Power Take Off
QD....................................................Quick Disconnect
RH..............................................................Right Hand
ROPS...........................Roll-Over Protective Structure
RPM ........................................Revolutions Per Minute
RT ....................................................................... Right
SAE..........................Society of Automotive Engineers
UNC .....................................................Unified Coarse
UNF...........................................................Unified Fine
UNS......................................................Unified Special
5/16 3/8 1/2 5/8 3/4 7/8
SAE Bolt Thread Sizes
MM 25 50 75 100 125 150 175
IN 1 7
Metric Bolt Thread Sizes
8MM 18MM14MM12MM10MM 16MM
2
34
5
6