Tri-Roll Thread Gage 1/8"-NPTF OD Comparator

Tri-Roll Thread Gage 1/8"-NPTF OD Comparator
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  • Item #: MTS1642
  • Manufacturer: Johnson Gage
  • Condition: Used

1/8" NPTF Tri-Roll Thread Comparator

Outiside Diameter 

Features -

  • Frame: C3
  • Gauging Points: 1-8" - NPTF
  • Stand: 101
  • Indicator: Johnson Dial .0025" *Note: Lens is loose
  • Gaging rolls are interchangeable

NPTF (National Pipe Taper Fuel) threads have the same taper of 3/4" per foot, and 60º thread angle as NPT. However, they do differ significantly in the crest and root truncation requirements. Tolerance limits are thigter for proper "dryseal" assembly.

As mentioned above, the lens cover is loose. Is included because it is an original Johnson dial indicator. Will repeat.

Well miantained. 

Made in USA

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Price $325.00
Availability In-Stock