| DEPARTURE FROM CITED DESIGNATOR | PTAK |
| EXTERNAL THREAD SIZE | 2-11-1/2 |
| EXTERNAL SCREW THREAD SERIES DESIGNATOR | NPT |
| EXTERNAL THREAD DIRECTION | RIGHT-HAND |
| INTERNAL SCREW THREAD SERIES DESIGNATOR | NPT |
| INTERNAL THREAD DIRECTION | RIGHT-HAND |
| INTERNAL THREAD SIZE | 1/4-18 |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-I-666, GRADE 1 FED SPEC 1ST MATERIAL RESPONSE AND QQ-I-666, GRADE 2 FED SPEC 2ND MATERIAL RESPONSE |
| MATERIAL | IRON CAST UNS F22400 OR IRON CAST UNS F22200 |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND A STYLE |
| STYLE DESIGNATOR | OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL) |
| WORKING PRESSURE AND SERVICE TYPE | 125.0 POUNDS PER SQUARE INCH NOMINAL STEAM AND 150.0 POUNDS PER SQUARE INCH NOMINAL WATER AND 150.0 POUNDS PER SQUARE INCH NOMINAL OIL AND 150.0 POUNDS PER SQUARE INCH NOMINAL GAS |