| DIAMETER OF RECESSED PORTION OF SHANK | 0.286 INCHES MINIMUM AND 0.291 INCHES MAXIMUM |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6382 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6415 ASSN STD 3RD MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 8740 OR STEEL COMP 4140 OR STEEL COMP 4340 |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.375 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.375 INCHES STUD THREAD |
| OVERALL LENGTH | 4.486 INCHES MINIMUM AND 4.496 INCHES MAXIMUM |
| STYLE DESIGNATOR | RECESSED |
| SURFACE FINISH | 32.0 MICROINCHES NUT THD |
| SURFACE FINISH | 32.0 MICROINCHES SHANK |
| SURFACE FINISH | 32.0 MICROINCHES UNDERCUTS |
| SURFACE FINISH | 32.0 MICROINCHES STUD THD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD CLASS | 3A STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.852 INCHES MINIMUM STUD THREAD AND 0.872 INCHES MAXIMUM STUD THREAD |
| THREAD PITCH DIAMETERS | +0.3392/+0.3407 INCHES STUD THREAD |
| THREAD QUANTITY PER INCH | 16 STUD THREAD |
| THREAD QUANTITY PER INCH | 24 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNS STUD THREAD |