NPTF & ANPT gauges — detail
Gauge family 05 / 11

NPTF & ANPT plug & ring gauges, manufactured in Pune.

ANSI/ASME B1.20.5SAE AS71051BDry-seal taper · ANSI/ASME B1.20.5 · SAE AS71051B

NPTF gauges to ANSI / ASME B1.20.5 and ANPT to SAE AS71051B. Dry-seal threads need controlled truncation, verified with L1 & L3 plug and L1 & L2 ring gauges plus crest-check members.

NPTF plug/ring
L1 & L3 · basic or min/max
ANPT crest check
6-step crest crack plug
Representative sizes & classes
ThreadStandardPlug gaugesRing gauges
NPTFANSI/ASME B1.20.5L1 & L3 (basic / min-max)L1 & L2 (basic / min-max)
ANPTSAE AS71051B6-step crest crack plug6-step crest crack ring

Ground on our Matrix thread grinders and verified on TRIMOS H4 before every certificate is issued.

Common questions

Questions about NPTF & ANPT gauges

What is a nptf & anpt gauges?

Dry-seal NPTF & ANPT gauges with L1–L3 members and 6-step crest checking.

Which standard does it follow?

Manufactured to ANSI/ASME B1.20.5, SAE AS71051B.

What range is available?

Available ranges: NPTF plug/ring L1 & L3 · basic or min/max; ANPT crest check 6-step crest crack plug.

How is it measured and verified?

Each gauge is measured and verified on our in-house equipment, against the sizes and classes shown in the table above.

How do I request a quote?

Share the thread size and standard on our quote page and we will confirm class, availability and pricing within one business day.

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Need nptf & anpt gauges?

Share your thread, standard or drawing and get the right acceptance class, certified. We supply across India and take enquiries from outside India too, see where we supply.