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NPT TAPER PIPE TAPS<br />
Right & Left Hand High Speed Steel<br />
Regular Cut - Standard Length<br />
Size<br />
Threads<br />
per Inch<br />
# Flutes<br />
Overall<br />
Length<br />
Thread<br />
Length<br />
Tap Drill<br />
Size†<br />
NPT<br />
Right<br />
Hand<br />
EDP #<br />
NPTF<br />
Right<br />
Hand<br />
EDP #<br />
NPT<br />
Left Hand<br />
EDP #<br />
1/16" 27 4 2.1/8" 11/16" D 40000 40001 40015<br />
1/8" * 27 4 2.1/8" 3/4" R 40030 40044 --<br />
1/8" 27 4 2.1/8" 3/4" R 40020 40021 40043<br />
1/4" 18 4 2.7/16" 1.1/16" 7/16" 40050 40051 40072<br />
3/8" 18 4 2.9/16" 1.1/16" 37/64" 40080 40081 40100<br />
1/2" 14 4 3.1/8" 1.3/8" 45/64" 40110 40111 40130<br />
3/4" 14 5 3.1/4" 1.3/8" 59/64" 40140 40141 40160<br />
1" 11½ 5 3.3/4" 1.3/4" 1.5/32" 40180 40181 40198<br />
1.1/4" 11½ 5 4" 1.3/4" 1.1/2" 40210 40211 40220<br />
1.1/2" 11½ 7 4.1/4" 1.3/4" 1.47/64" 40230 40231 40240<br />
2" 11½ 7 4.1/2" 1.3/4" 2.7/32" 40250 40251 40260<br />
2.1/2" 8 7 5.1/2" 2.9/16" 2.5/8" 40270 -- --<br />
3" 8 7 6" 2.5/8" 3.1/4" 40280 -- --<br />
3.1/2" 8 9 6.1/2" 2.11/16" 3.3/4" 40290 -- --<br />
4" 8 9 6.3/4" 2.3/4" 4.1/4" 40300 -- --<br />
* Small Shank<br />
† Sizes given permit direct tapping without reaming the hole, but only give a full thread for the first two<br />
or three threads<br />
V 1.0 – November 2011 Page 60
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