| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 2.136 INCHES MINIMUM AND 2.166 INCHES MAXIMUM |
| GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM |
| HEAD DIAMETER | 0.328 INCHES MINIMUM AND 0.385 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW MACHINE - FLAT |
| MATERIAL | UNABLE TO DECODE |
| SPECIAL FEATURES | QUALIFIED MANUFACTURER P/N NAS1153V30F (NCAGE K8753). TO COMPLY WITH REACH REGULATION SURFACE TREAMENT CODE A IS INACTIVE FOR NEW DESIGN AND PROCUREMENT AFTER 01-19. EXHAUST STOCKS USE CODE F SEE TABLE OF SUBTITUTIONS. |
| SPECIFICATION/STANDARD DATA | 80205-NAS1153 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.276 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |