Appendix 59
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° 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