ACCUD - NPT Thread Ring Gauge – 544 Series
| Code | Size | Code | Size |
| 544-027-04R | NPT 1/16” x 27 | 544-11D5-12R | NPT1-1/4”x11.5 |
| 544-027-03R | NPT 1/8” x 27 | 544-11D5-11R | NPT1-1/2”x11.5 |
| 544-018-02R | NPT 1/4” x 18 | 544-11D5-20R | NPT2”x 11.5 |
| 544-018-33R | NPT 3/8” x18 | 544-008-21R | NPT2-1/2”x8 |
| 544-014-01R | NPT 1/2” x 14 | 544-008-30R | NPT3”x8 |
| 544-014-32R | NPT3/4” x 14 | 544-008-32R | NPT3-1/2”x8 |
| 544-11D5-10 R | NPT1” x 11.5 | 544-008-40R | NPT 4”x8 |
