Bolts Main Page | Tap Drill Sizes



Pipe Tap Drill Sizes

Pipe Tap Tap Drill Size Pipe Tap Tap Drill Size
Nominal
Pipe
Tap
Taper
NPT
Straight
NPS
Nominal
Pipe
Tap
Taper
NPT
Straight
NPS
1/16-27 #D 1/4" 3/4-14 59/64" 15/16"
1/8-27 #R #S 1.0-11.5 1-5/32" 1-3/16"
1/4-28 7/16" 29/64" 1.25-11.5 1-1/2" 1-33/64"
3/8-18 37/64" 19/32" 1.50-11.5 1-47/64" 1-3/4"
1/2-14 23/32" 47/64" 2.0-11.5 2-7/32" 2-7/32"

 

Metric Tap Drill Sizes

Tap
Size
Tap
Drill
Size
Tap
Size
Tap
Drill
Size
Tap
Size
Tap
Drill
Size
M2 x .4 1.60mm M10 x 1.5 8.5mm M18 x 2.5 15.5mm
M2.5 x .45 2.05mm M10 x 1.25 8.75mm M18 x 1.5 16.5mm
M3 x .5 2.5mm M12 x 1.75 10.25mm M20 x 2.5 17.5mm
M4 x .7 3.3mm M12 x 1.25 10.75mm M20 x 1.5 18.5mm
M5 x .8 4.2mm M14 x 2.0 12mm M24 x 3.0 21mm
M6 x 1.0 5mm M14 x 1.5 12.5mm M30 x 3.5 26.5mm
M8 x 1.25 6.75mm M16 x 2.0 14mm M36 x 4.0 32mm
M8 x 1.0 7mm M16 x 1.5 14.5mm

 

Hole size for tapping screws

Nominal
Screw
Size
Type
A, AB
Type
F
Nominal
Screw
Size
Type
A, AB
Type
F
Nominal
Screw
Size
Type
A, AB
Type
F
#2 #48 #49 #3 #46 #46 #4 #44 #44
#5 #36 #37 #6 #32 #31 #7 #30
#8 #29 #26 #10 #21 #10 Course thread #17
#10 Fine thread #16 #12 3/16" #8 #14 1/4" 5.5mm #1

 


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Phone: ( 323 ) 587-0382 • FAX: ( 323 ) 587-8712 • E-mail: sales@smithfast.com
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