| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.249 INCHES MINIMUM AND 0.254 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.400 INCHES NOMINAL |
| ABKY | EXTERNAL PREBENT KEY LENGTH | 0.120 INCHES NOMINAL |
| ABLF | EXTERNAL PREBENT KEY WIDTH | 0.059 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| ABLS | DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY | 0.246 INCHES MINIMUM AND 0.254 INCHES MAXIMUM |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 0.446 INCHES MINIMUM AND 0.454 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.022 INCHES MINIMUM AND 0.028 INCHES MAXIMUM |
| FEAT | SPECIAL FEATURES | CENTER HOLE SHAPE,ROUND W/FLATS,WTH 0.250 NOM IN. ACROSS ROUNDED FLATS,WTH 0.205 NOM ACROSS FLATS |
| HUES | COLOR | BLACK OVERALL |
| MATT | III MATERIAL | STEEL COMP 303 OVERALL |
| SFTT | SURFACE TREATMENT | OXIDE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171,3.3.4 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | KEY |
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