| DIAMETER OF RECESSED PORTION OF SHANK | 0.250 INCHES NOMINAL |
| LENGTH OF RECESSED PORTION OF SHANK | 0.112 INCHES NOMINAL |
| OVERALL LENGTH | 0.999 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 4130 |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.375 INCHES STUD THREAD |
| PLAIN SHANK DIAMETER | 0.284 INCHES MINIMUM AND 0.294 INCHES MAXIMUM |
| STYLE DESIGNATOR | RECESSED AND STEPPED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM 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 | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM NUT THREAD |
| THREAD LENGTH | 0.382 INCHES MINIMUM AND 0.412 INCHES MAXIMUM STUD THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) NUT THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| THREAD QUANTITY PER INCH | 16 STUD THREAD |
| THREAD QUANTITY PER INCH | 32 NUT THREAD |