| EXTENDED WASHER THICKNESS | 0.028 INCHES MINIMUM AND 0.033 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.498 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| FASTENER LENGTH | 0.59 INCHES MINIMUM AND 0.62 INCHES MAXIMUM |
| HEAD HEIGHT | 0.096 INCHES MINIMUM AND 0.106 INCHES MAXIMUM |
| HEAD DIAMETER | 0.435 INCHES MINIMUM AND 0.437 INCHES MAXIMUM |
| HEAD STYLE | ROUND EXTENDED WASHER |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.25 INCHES |
| SCREW MATERIAL | STEEL COMP 4037 OR STEEL COMP 8630 |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | SAE-AMS6300 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-S-6050A(2) NOT 3 MIL SPEC SINGLE MATERIAL RESPONSE |
| SCREW SURFACE TREATMENT | CADMIUM |
| THREAD LENGTH | 0.19 INCHES MINIMUM AND 0.22 INCHES MAXIMUM |
| THREAD CLASS | 31 |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |