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50 Appendix
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