| EXTERNAL THREAD TOLERANCE CLASS | CLOSE |
| FASTENER LENGTH | 0.438 INCHES NOMINAL |
| HEAD DIAMETER | 0.309 INCHES MINIMUM AND 0.319 INCHES MAXIMUM |
| HEAD HEIGHT | 0.123 INCHES MINIMUM AND 0.130 INCHES MAXIMUM |
| HEAD STYLE | FLAT FILLISTER |
| INTERNAL DRIVE STYLE | SLOT |
| MINIMUM TENSILE STRENGTH | 56000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.185 INCHES |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | K7766-A31 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE |
| SCREW MATERIAL | STEEL |
| SCREW SURFACE TREATMENT | CADMIUM |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | K0379-DTD 904 GOVERNMENT STD/SPEC SINGLE TREATMENT RESPONSE |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.438 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | BA |
| THREAD PITCH IN MILLIMETERS | 0.81 |