BESTO supply API Numbered Connections (N.C.) working, reference and regional master gages per API specification 7-2 for sizes from 2 to 6-5/8 inches in diameter. All working gages are manufactured and certified using a certified API reference master gage as required by the standard.
| NUMBERED CONNECTIONS (N.C.) MASTER GAGES | |||
| SIZE | T.P.I. | T.P.F. | THD FORM |
| NC10 | 6 | 1-1/2 | V-0.055R |
| NC12 | 6 | 1-1/2 | V-0.055R |
| NC13 | 6 | 1-1/2 | V-0.055R |
| NC16 | 6 | 1-1/2 | V-0.055R |
| NC23 | 4 | 2 | V-0.038R |
| NC26 (2-3/8 I.F.) | 4 | 2 | V-0.038R |
| NC31 (2-7/8 I.F.) | 4 | 2 | V-0.038R |
| NC35 | 4 | 2 | V-0.038R |
| NC38 (3-1/2 I.F.) | 4 | 2 | V-0.038R |
| NC40 (4 FH) | 4 | 2 | V-0.038R |
| NC44 | 4 | 2 | V-0.038R |
| NC46 | 4 | 2 | V-0.038R |
| NC50 (4-1/2 IF) (5 XH) | 4 | 2 | V-0.038R |
| NC56 | 4 | 3 | V-0.038R |
| NC61 | 4 | 3 | V-0.038R |
| NC70 | 4 | 3 | V-0.038R |
| NC77 | 4 | 3 | V-0.038R |
Instructions:
1）Implementation of standards：API SPEC7-2：2017
2）Material: GCr15， Measuring surface hardness 60-63HRC;
3）Comes with the calibration certificates issued by NIM.
How to order?
For example:
Pls mark : Master Gauges: NC50 RING&PLUG, or NC50 BOX&PIN,
and E-mail to: sales@bestogages.com