Non-standard 250.83 mm buttress thread casing-pipe joint gauge

A non-standard 250.83 mm buttress thread casing-pipe joint gauge, which comprises a plug gauge disc and a ring gauge. The size of the plug gauge and the ring gauge is 250.83 mm, and the parameters of the plug gauge and the ring gauge are: The conical pipe external thread with a taper of 1:16; 5 teeth within each 25.4mm of thread; the thread height 15.748mm; the guide surface thread angle 10 degreed, the back face thread angle 3 degreed, the pitch diameter E[7] 249.657mm, the plug gauge disc diameter D[4] 251.231mm, the plug gauge groove diameter D[U] 246.456mm, the plug gauge groove width U 4.763mm, the large diameter on plug gauge end D[0] 254.432mm, the length from the plug gauge pitch diameter plane to the vanishing point plane a[3] 50.94mm, the length from the plug gauge end to the plug gauge pitch diameter plane L[7]64.224mm, the length L[4]from the plug gauge end to the vanishing point plane a[3]114.618mm, the ring gauge bore Q diameter 254.381mm, the stand-off S of the ring gauge and the plug gauge pair is 5.08mm, the ring gauge length L[4]-S 109.538mm. The gauge can measure non-standard 250.83mm buttress thread casing-pipe joint.