| EXTENDED WASHER DIAMETER | 1.870 INCHES NOMINAL |
| EXTENDED WASHER THICKNESS | 0.258 INCHES NOMINAL |
| FASTENER LENGTH | 5.837 INCHES NOMINAL |
| GRIP DIAMETER | 1.1225 INCHES MINIMUM AND 1.1240 INCHES MAXIMUM |
| GRIP LENGTH | 3.375 INCHES NOMINAL |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 1.051 INCHES NOMINAL |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP E4340 OR STEEL COMP 8740 OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 1.125 INCHES |
| WIDTH BETWEEN FLATS | 1.245 INCHES MINIMUM AND 1.255 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS638 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.587 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 12 |