| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 2.750 INCHES NOMINAL |
| HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 1.250 INCHES MINIMUM AND 1.303 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| NECK WIDTH | 0.750 INCHES MINIMUM AND 0.765 INCHES MAXIMUM |
| NOMINAL THREAD DIAMETER | 0.750 INCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC 1ST TREATMENT RESPONSE OR ASTM B633,TYPE 2 ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OR ZINC AND CHROMATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.250 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNC |
| THREAD QUANTITY PER INCH | 10 |