| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASB | FASTENER LENGTH | 0.066 INCHES MINIMUM AND 0.069 INCHES MAXIMUM |
| AASL | HEAD DIAMETER | 0.508 INCHES MAXIMUM |
| ABQZ | INTERNAL DRIVE STYLE | CROSS RECESS TYPE II |
| AGAV | END ITEM IDENTIFICATION | AIRCRAFT, TRISTAR |
| AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| CRSQ | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| CYAU | SCREW MATERIAL | IRON ALLOY 660 |
| CYBA | SCREW SURFACE TREATMENT | PASSIVATE |
| CYBE | SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS4003 ASSN STD SINGLE TREATMENT RESPONSE |
| THSD | THREAD SERIES DESIGNATOR | UNEF |
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