| EXTENDED WASHER THICKNESS | 0.019 INCHES MINIMUM AND 0.031 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.322 INCHES MINIMUM AND 0.348 INCHES MAXIMUM |
| EXTERNAL THREAD TOLERANCE CLASS | 2B |
| FASTENER LENGTH | 0.250 INCHES NOMINAL |
| HEAD HEIGHT | 0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON EXTENDED WASHER |
| HEAD SURFACE TREATMENT | CHROMATE AND ZINC |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE II |
| LOCKING FEATURE MATERIAL | STEEL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, TFS HEXAGON WASHER AND PHILLIPS COMBINATION HEAD |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| SCREW MATERIAL | STEEL |
| SCREW SURFACE TREATMENT | CHROMATE AND ZINC |
| SHANK SURFACE TREATMENT | CHROMATE AND ZINC |
| WIDTH BETWEEN FLATS | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.250 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES DESIGNATOR | UNC |