| DISTANCE ACROSS FLATS | 0.434 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 3.120 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP E4340 |
| NOMINAL THREAD SIZE | 0.437 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.437 INCHES STUD THREAD |
| SHOULDER DIAMETER | 0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM |
| SHOULDER LENGTH | 1.370 INCHES MINIMUM AND 1.380 INCHES MAXIMUM |
| STYLE DESIGNATOR | SHOULDERED |
| SURFACE TREATMENT | CADMIUM AND CHROMATE 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 | 0.440 INCHES NOMINAL STUD THREAD |
| THREAD LENGTH | 0.440 INCHES NOMINAL NUT THREAD |
| THREAD QUANTITY PER INCH | 20 NUT THREAD |
| THREAD QUANTITY PER INCH | 20 STUD THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNF STUD THREAD |