| CONCENTRIC HOLE DEPTH | 0.150 INCHES MINIMUM AND 0.255 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.1076 INCHES MINIMUM AND 0.1157 INCHES MAXIMUM |
| FASTENER LENGTH | 0.803 INCHES MINIMUM AND 0.821 INCHES MAXIMUM |
| HEAD HEIGHT | 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM |
| HEAD STYLE | DISHED HEXAGON |
| INTERNAL THREAD CLASS | 3B COUNTERBORE |
| INTERNAL THREAD LENGTH | 0.138 INCHES MINIMUM AND 0.158 INCHES MAXIMUM COUNTERBORE |
| INTERNAL THREAD DIRECTION | RIGHT-HAND COUNTERBORE |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5636 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| NOMINAL THREAD SIZE | 0.138 INCHES COUNTERBORE |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| SPECIAL FEATURES | UNDEUNDERCUT UNDER COUNTERBORE DIA. 0.098 MIN. AND UNDER CUT UNDER COUNTERBORE DIA. 0.098 MIN. AND 0.102 MAX LENGTH 0.047 MAX AND 0.012 MAX RADIUS. |
| WIDTH BETWEEN FLATS | 0.246 INCHES MINIMUM AND 0.254 INCHES MAXIMUM |
| STYLE DESIGNATOR | COUNTERBORE THREADED |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.457 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNJC |
| THREAD SERIES | UNJC COUNTERBORE |
| THREADS PER INCH | 32 COUNTERBORE |