| THREAD SERIES DESIGNATOR | UN |
| NOMINAL THREAD DIAMETER | 1.062 INCHES |
| THREAD QUANTITY PER INCH | 16 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.524 INCHES MINIMUM |
| FASTENER LENGTH | 2.437 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4340 OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| SHOULDER DIAMETER | 1.2490 INCHES MINIMUM AND |
| 1.2495 INCHES MAXIMUM |
| SHOULDER LENGTH | 1.815 INCHES MINIMUM AND |
| 1.820 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.750 INCHES NOMINAL |
| HEAD STYLE | DEE |
| HEAD DIAMETER | 1.990 INCHES MINIMUM AND |
| 2.000 INCHES MAXIMUM |
| HEAD HEIGHT | 0.188 INCHES NOMINAL |
| DISTANCE FROM CENTERLINE TO FLAT | 0.875 INCHES NOMINAL |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.280 INCHES MINIMUM AND |
| 2.290 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.128 INCHES NOMINAL FIRST HOLE |
| SPECIAL FEATURES | DRILL 2 HOLES FOR COTTER PIN 0.128 IN. DIA 90.0 DEG APART AND CONCENTRIC HOLE SURFACE WITH CHROMATE TREATMENT MIL-B-6868 |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 02121 |
| DESIGN CONTROL REFERENCE | 5513-5 |