| LENGTH TO SHOULDER | 1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5640 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X OVERALL |
| NOMINAL THREAD SIZE | 1.750 INCHES |
| NOMINAL TUBE OUTSIDE DIAMETER | 1.375 INCHES |
| NUT HEIGHT | 1.310 INCHES MINIMUM AND 1.330 INCHES MAXIMUM |
| NUT STYLE | TUBE COUPLING |
| PRECIOUS MATERIAL AND LOCATION | SURFACE SILVER |
| SMALLEST INSIDE DIAMETER | 1.425 INCHES MINIMUM AND 1.431 INCHES MAXIMUM |
| SURFACE TREATMENT | SILVER OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UN |
| THREAD QUANTITY PER INCH | 12 |
| WIDTH ACROSS FLATS | 2.113 INCHES MINIMUM AND 2.127 INCHES MAXIMUM |