| DISTANCE ACROSS FLATS | 0.493 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 1.300 INCHES MINIMUM AND 1.320 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS6322 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6327 ASSN STD SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 8740 |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.312 INCHES STUD THREAD |
| SHOULDER LENGTH | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| STYLE DESIGNATOR | SHOULDERED AND STEPPED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.326 INCHES MINIMUM AND 0.366 INCHES MAXIMUM STUD THREAD |
| THREAD LENGTH | 0.540 INCHES NOMINAL NUT THREAD |
| THREAD QUANTITY PER INCH | 18 STUD THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| THREAD PITCH DIAMETERS | +0.3010 TO 0.3025 INCHES STUD THREAD |
| THREAD SERIES DESIGNATOR | UNC NUT THREAD |
| THREAD SERIES DESIGNATOR | UNS STUD THREAD |