| FASTENER LENGTH | 0.250 INCHES NOMINAL |
| HEAD DIAMETER | 0.262 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| HEAD HEIGHT | 0.159 INCHES MINIMUM AND 0.164 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER |
| HOLE DIAMETER | 0.044 INCHES MINIMUM AND 0.050 INCHES MAXIMUM |
| HOLE TYPE | DRILLED |
| INTERNAL DRIVE STYLE | HEXAGON |
| NOMINAL THREAD DIAMETER | 0.1640 INCHES |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 NATIONAL SPEC SINGLE MATERIAL RESPONSE OR AMS5737 NATIONAL SPEC SINGLE MATERIAL RESPONSE AND FF-S-86 FED STD ALL MATERIAL RESPONSES AND NAS1351 NATIONAL SPEC ALL MATERIAL RESPONSES |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416, TYPE II CLASS 2 NATIONAL SPEC SINGLE TREATMENT RESPONSE |
| SCREW MATERIAL | STEEL |
| SCREW SURFACE TREATMENT | CADMIUM |
| SPECIAL FEATURES | MINIMUM BREAKING STRENGTH (LBF): 2360.0 NOMINAL. HEAD WILL HAVE (6) DRILLED HOLES SPACED 60 DEGREES |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.875 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 36 |
| THREAD SERIES DESIGNATOR | UNRF |
| WIDTH ACROSS FLATS | 0.141 INCHES NOMINAL |