| FIRST END LOCATION | THREADED END |
| FIRST END SLOT DEPTH | 0.070 INCHES MINIMUM AND 0.110 INCHES MAXIMUM |
| FIRST END SLOT WIDTH | 0.100 INCHES MINIMUM AND 0.140 INCHES MAXIMUM |
| FIRST END STYLE | SLOTTED |
| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| INTERNAL DRIVE STYLE | SLOT |
| OVERALL LENGTH | 3.900 INCHES MINIMUM AND 3.920 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4340 OR STEEL COMP 4140 OVERALL |
| NOMINAL THREAD SIZE | 0.375 INCHES |
| SECOND END STYLE | SQUARE |
| SECOND END RELATIONSHIP WITH FIRST END | NOT IDENTICAL |
| SHANK DIAMETER | 0.478 INCHES MINIMUM AND 0.492 INCHES MAXIMUM |
| SHANK LENGTH | 0.459 INCHES MINIMUM AND 0.509 INCHES MAXIMUM |
| SHOULDER DIAMETER | 0.494 INCHES MINIMUM AND 0.498 INCHES MAXIMUM |
| SPECIAL FEATURES | SECONDARY STEP ON SHANK END 0.488 IN. MIN 0.492 IN. MAX DIA 0.245 IN. MIN 0.255 IN. MAX WIDTH THREAD RELIEF TO ROOT DIA |
| SURFACE FINISH | 250.0 MICROINCHES SHOULDER END |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171 FINISH NO. 5.3.1.3 MIL STD 1ST TREATMENT RESPONSE OR MIL-STD-171 FINISH NO. 5.3.2.3. MIL STD 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE MANGANESE OR PHOSPHATE ZINC OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNC |