| DISTANCE ACROSS FLATS | 0.861 INCHES MINIMUM AND 0.875 INCHES MAXIMUM |
| OVERALL LENGTH | 2.190 INCHES MINIMUM AND 2.270 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM-A322 ASSN STD ALL MATERIAL RESPONSES OR ASTM-A331 ASSN STD ALL MATERIAL RESPONSES |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 8640 |
| NOMINAL THREAD SIZE | 0.250 INCHES STUD THREAD |
| NOMINAL THREAD SIZE | 0.375 INCHES NUT THREAD |
| SHOULDER LENGTH | 0.160 INCHES MINIMUM AND 0.200 INCHES MAXIMUM |
| SPECIAL FEATURES | HEAT TREAT,QUENCH AND TEMPER,ROCKWELL HARDNESS C32-38;RECESS DIA 0.298 INCHES BETWEEN HEX AND NUT THREAD END,ALSO RECESS AROUND HEX 0.012 INCHES |
| STYLE DESIGNATOR | SHOULDERED AND STEPPED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 2B NUT THREAD |
| THREAD CLASS | 2B STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.380 INCHES NOMINAL NUT THREAD |
| THREAD LENGTH | 1.120 INCHES MINIMUM STUD THREAD |
| THREAD QUANTITY PER INCH | 16 NUT THREAD |
| THREAD QUANTITY PER INCH | 20 STUD THREAD |
| THREAD SERIES DESIGNATOR | UNC NUT THREAD |
| THREAD SERIES DESIGNATOR | UNC STUD THREAD |