NOTE: Chart shows bolt thread sizes and corresponding head (wrench) sizes for standard SAE and metric bolts.
SAE Bolt Thread Sizes
5/16
3/8
IN
1
MM
25
Metric Bolt Thread Sizes
8MM
10MM
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
Bolt Torque & Size Charts (Rev. 3/28/2007)
BOLT SIZE CHART
1/2
5/8
2
3
50
75
12MM
ABBREVIATIONS
3/4
4
5
100
125
14MM
16MM
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
Appendix 35
7/8
7
6
150
175
18MM