| BEARING SURFACE OF HEAD SURFACE FINISH | 32.0 MICROINCHES |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| HEAD DIAMETER | 0.491 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| HEAD HEIGHT | 0.106 INCHES NOMINAL |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE III |
| LOCKING FEATURE MATERIAL DOCUMENT AND CLASSIFICATION | AMS3650,COLOR OPTIONAL,390 DEG F MAX TEMPERATURE NATIONAL SPEC SINGLE MATERIAL RESPONSE |
| LOCKING FEATURE MATERIAL | PLASTIC POLYCHLOROTRIFLUOROETHYLENE |
| LOCKING FEATURE | STRIP |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,SELF-LOCKING,FLAT 100 DEG. HEAD,CRUCIFORM AND OFFSET CRUCIFORM RECESS,FULL THREAD |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| SCREW MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731,5732,5737 OR AMS5853 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2700,METHOD I,CLASS 4 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE |
| SCREW MATERIAL | IRON ALLOY 660 |
| SCREW SURFACE TREATMENT | PASSIVATE |
| SPECIFICATION/STANDARD DATA | 80205-NAS1189 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.394 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD SURFACE FINISH | 32.0 MICROINCHES |