Page 699 - Yamawa_European_Catalogue_YEU21

17. Taps for Pipe Threads

Intro

Classification of American pipe thread taps
SP
Standard Symbol Class Material Threads to be cut Range
Straight Pipe Thread Tap NPS Ground Thread HSS NPSC, NPSM -1
Dryseal Straight Pipe Thread Tap NPSF Ground Thread HSS NPSF -¾
Taper Pipe Thread Tap NPT Ground Thread HSS NPT -2
SL
Dryseal Taper Pipe Thread Tap NPTF Ground Thread HSS NPTF -2

PO
Thread limit of American Pipe Thread Taps
Straight pipe thread taps for (NPS) G Class

ST

ROLL
Max: Major Dia. Min: Major Dia.

Max: Pitch Dia. Min: Pitch Dia. Max: Minor Dia. CARBIDE

LONG

Major diameter Pitch diameter Minor diameter*
Size
Max. Min. Tolerance Max. Min. Tolerance Max. HAND
NPS e - 27 10.241 10.216 0.025 9.527 9.515 0.012 M - 0.053 TAPS
NPS w - 18 13.606 13.582 0.024 12.542 12.530 0.012 M - 1.019
NPS y - 18 17.045 17.021 0.024 15.981 15.969 0.012 M - 1.019
NPS q - 14 21.226 21.202 0.024 19.840 19.828 0.012 M - 1.334
EG (STI)
NPS t - 14 26.560 26.536 0.024 25.186 25.162 0.024 M - 1.334
NPS 1 - 11.5 33.215 33.176 0.037 31.526 31.502 0.024 M - 1.644
*Above dimensions change depending on actually measured
SPECIAL
THREADS,
GAUGES

THREAD
MILLS

DIES

CENTER
DRILLS

Technical
info

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