| MATERIAL DOCUMENT AND CLASSIFICATION | DEF 13 GROUP 5B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 1.250 INCHES |
| NUT STYLE | HEXAGON |
| OVERALL HEIGHT | 1.040 INCHES MINIMUM AND 1.060 INCHES MAXIMUM |
| SPECIAL FEATURES | 2 CUTOUTS ON WASHER MADE BY A 1 IN. DIA CUTTER;0.050/0.080 IN. MIN/MAX X 45 DEG CHAMFER AROUND TOP EDGE OF WASHER |
| WASHER OUTSIDE DIAMETER | 2.500 INCHES NOMINAL |
| WASHER THICKNESS | 0.350 INCHES MINIMUM AND 0.390 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 1.845 INCHES MINIMUM AND 1.875 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DEF SPEC 29A CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 12 |
| THREAD SERIES | UNF |