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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 37
7/8
7
6
150
175
18MM
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