| DISTANCE ACROSS FLATS | 0.500 INCHES NOMINAL |
| HARDNESS RATING | 43.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 3.875 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP E4340 |
| NOMINAL THREAD SIZE | 0.438 INCHES STUD THREAD |
| NUT END SHANK DIAMETER | 0.426 INCHES MINIMUM AND 0.431 INCHES MAXIMUM |
| SHOULDER LENGTH | 0.250 INCHES NOMINAL |
| STUD END SHANK DIAMETER | 0.426 INCHES MINIMUM AND 0.431 INCHES MAXIMUM |
| STUD END SHANK LENGTH | 0.160 INCHES NOMINAL |
| STYLE DESIGNATOR | SHOULDERED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | CVA5-2 FSCM 80378 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 2A NUT THREAD |
| THREAD CLASS | 2A STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.875 INCHES NOMINAL STUD THREAD |
| THREAD LENGTH | 1.750 INCHES NOMINAL NUT THREAD |
| THREAD QUANTITY PER INCH | 20 STUD THREAD |
| THREAD SERIES DESIGNATOR | UNF STUD THREAD |