| MRC | Criteria | Characteristic |
|---|
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.213 INCHES MINIMUM AND 0.233 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 1.285 INCHES MINIMUM AND 1.305 INCHES MAXIMUM |
| AASK | HEAD STYLE | HEXAGON |
| AASU | HEAD HEIGHT | 0.083 INCHES MINIMUM AND 0.103 INCHES MAXIMUM |
| AATB | WIDTH BETWEEN FLATS | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM |
| AAWC | FIRST DIAMETER FROM HEAD | 0.161 INCHES MINIMUM AND 0.181 INCHES MAXIMUM |
| AAWD | SECOND DIAMETER FROM HEAD | 0.1966 INCHES MINIMUM AND 0.1969 INCHES MAXIMUM |
| AAWE | THIRD DIAMETER FROM HEAD | 0.083 INCHES MINIMUM AND 0.093 INCHES MAXIMUM |
| AAWH | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM |
| AAWJ | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 1.005 INCHES MINIMUM AND 1.010 INCHES MAXIMUM |
| AAWK | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER | 1.062 INCHES MINIMUM AND 1.082 INCHES MAXIMUM |
| ABQZ | INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| AHYM | NOMINAL THREAD DIAMETER | 0.138 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| CQFM | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| CSNG | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| MATT | MATERIAL | STEEL COMP 630 OVERALL OR STEEL COMP 324 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763,COND A FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
