The taper thread gauges for graphite electrode are used for general calibration of electrodes and nipples, normally there are taper working gauges and master gauges.

Two taper working plug gauges are used for calibrating electrodes, three taper working ring gages are used for calibrating nipples. One master ring gauges are used for calibrating working plug gauges, one master plug gauges are used for calibrating working ring gauges, there 7pcs gauges for one size graphite electrode.

The American Petroleum Institute (API) establishes a controlled gaging program to insure API thread form specifications are met in the production of oil field equipment, tools and pipe. API requires that those manufacturers using the API monogram inspect these components with working gages set to API master gages. We are licensed by the Institute to use the API monogram on all the API Spec 5B, Spec 7-2 and Spec 11B Master gages we sell.

Sets Included:
1 Block: 30mm
1 Block: 41.3mm
1 Block: 131.4mm
2 Steel Setting Rings: 4mm, 25mm
1 Pair of gloves.
Gage Block Grade: Class 1

Order No. 630-0000

2009.12.