| FASTENER LENGTH | 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM |
| HEAD HEIGHT | 0.224 INCHES MINIMUM AND 0.244 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-890 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| POINT DIAMETER | 0.230 INCHES MINIMUM AND 0.235 INCHES MAXIMUM |
| POINT LENGTH | 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM |
| POINT STYLE | DOG |
| THREAD LENGTH | 0.188 INCHES MINIMUM AND 0.469 INCHES MAXIMUM |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 18 |
| WIDTH BETWEEN FLATS | 0.552 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |