| FASTENER LENGTH | 0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |
| HEAD DIAMETER | 0.594 INCHES MINIMUM AND 0.615 INCHES MAXIMUM |
| HEAD HEIGHT | 0.203 INCHES MINIMUM AND 0.218 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE |
| SCREW SURFACE TREATMENT | OXIDE |
| SCREW MATERIAL | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.420 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 1B |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |