| COUNTERBORE DIAMETER | 1.420 INCHES MINIMUM AND 1.440 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 90.0 DEGREES NOMINAL |
| FLANGE DIAMETER | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM |
| FLANGE THICKNESS | 0.170 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | DD/TS/0107/86 GROUP 202(H) MFR REF SINGLE MATERIAL RESPONSE OR SPEC HWS4 GROUP 202J MIL STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY OVERALL |
| NOMINAL THREAD SIZE | 1.312 INCHES |
| NUT COUNTERBORE DEPTH | 2.090 INCHES MINIMUM AND 2.110 INCHES MAXIMUM |
| NUT WIDTH ACROSS FLATS | 1.865 INCHES MINIMUM AND 1.875 INCHES MAXIMUM |
| NUT LENGTH | 3.190 INCHES NOMINAL |
| SPECIAL FEATURES | 1.75 IN. OD EXT RELIEVED BODY |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 12 |
| THREAD SERIES | UN FORM |