Appendix 53
Bolt Torque & Size Charts (Rev. 9/5/00)
BOLT SIZE CHART
NOTE:
Chart shows bolt thread sizes and corresponding head (wrench) sizes for standard SAE and metric bolts.
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
2
3
4
5
6
7
Metric Bolt Thread Sizes
8MM
18MM
14MM
12MM
10MM
16MM
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
