Tapered go/no-go thread plug gauge. L1, L3.

Product features and benefits:

Three measuring stages (min., base, max.) for NPT/NPTF-1.
NPTF-2 on request (four measuring stages).
On request with customised marking and factory calibration certificate.

Gauge system NPTF-2 acc. ASME B1.20.5:

For NPTF internal thread:

- L1 thread plug gauge ("4-step" design)

- L3 thread plug gauge ("4-step" design)

- Plug gauge "Crest Check" ("6-step"), for checking the tread crest on the minor diameter

- Plug gauge "Root Check" ("6-step"), for checking the thread root on the major diameter

For NPTF external thread:

- L1 thread ring gauge ("4-step" design)

- L2 thread ring gauge ("4-step" design)

- Ring gauge "Crest Check" ("6-step"), for checking the tread crest on the major diameter

- Ring gauge "Root Check" ("6-step"), for checking the thread root on the minor diameter