| EXTENDED WASHER DIAMETER | 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.064 INCHES MINIMUM AND 0.104 INCHES MAXIMUM |
| FASTENER LENGTH | 1.312 INCHES MINIMUM AND 1.375 INCHES MAXIMUM |
| HEAD HEIGHT | 0.439 INCHES MINIMUM AND 0.604 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON EXTENDED WASHER |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | Q-W-409 FED SPEC 13TH MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.437 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.064 INCHES MINIMUM AND 0.104 INCHES MAXIMUM |
| PRIMARY WASHER OUTSIDE DIAMETER | 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | FLAT |
| SINGLE SHEAR STRENGTH | 8190 POUNDS PER SQUARE INCH |
| WASHER QUANTITY | 1 |
| WIDTH BETWEEN FLATS | 0.675 INCHES MINIMUM AND 0.687 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.125 INCHES MINIMUM AND 1.250 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 20 |