Appendix 21Bolt Torque & Size Charts (Rev. 3/28/2007)
BOLT SIZE CHART
NOTE: Chart shows bolt thread sizes and corresponding he ad (wrench) sizes for standard SAE and metric bolts.
ABBREVIATIONS
AG ..............................................................Agriculture
ASABE.................... American Society of Agricultural &
Biological Engineers (formerly ASAE)
ASAE....... American Society of Agricu ltural 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