| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| HEAD DIAMETER | 0.442 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| HEAD STYLE | ROUND WEDGE |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED STD 66 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| POINT DIAMETER | 0.127 INCHES MINIMUM AND 0.133 INCHES MAXIMUM |
| POINT LENGTH | 0.150 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| POINT STYLE | DOG |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.139 INCHES MINIMUM AND 0.230 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |