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18 Appendix
Bolt Torque & Size Charts (Rev. 10/10/2005)
BOLT SIZE CHART
NOTE: Chart shows bolt thread sizes and corresponding head (wrench) sizes for standard SAE and metric bolts.
ABBREVIATIONS
AG ............................................................ Agriculture
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
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