| EXTENDED WASHER THICKNESS | 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM | 
| EXTENDED WASHER DIAMETER | 0.877 INCHES MINIMUM AND 0.893 INCHES MAXIMUM | 
| FASTENER LENGTH | 1.421 INCHES NOMINAL | 
| HEAD HEIGHT | 0.240 INCHES MINIMUM AND 0.252 INCHES MAXIMUM | 
| HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER | 
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5629 ASSN STD 1ST MATERIAL RESPONSE OVERALL | 
| MATERIAL | STEEL OVERALL | 
| PROPRIETARY CHARACTERISTICS | PACS | 
| NOMINAL THREAD DIAMETER | 0.500 INCHES | 
| WIDTH BETWEEN FLATS | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.703 INCHES NOMINAL | 
| THREAD QUANTITY PER INCH | 20 | 
| THREAD SERIES DESIGNATOR | UNJF |