| MRC | Criteria | Characteristic |
|---|---|---|
| AAEL | THREADS PER INCH | 20 CONCENTRIC HOLE |
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 3.750 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 4.000 INCHES NOMINAL |
| AASK | HEAD STYLE | HEXAGON |
| AASU | HEAD HEIGHT | 0.562 INCHES NOMINAL |
| AATB | WIDTH BETWEEN FLATS | 1.000 INCHES NOMINAL |
| AAWX | CONCENTRIC HOLE DEPTH | 0.500 INCHES NOMINAL |
| AAXC | CONCENTRIC HOLE DIAMETER | 0.391 INCHES NOMINAL |
| AHYM | NOMINAL THREAD DIAMETER | 0.750 INCHES |
| BZRR | THREAD SERIES | UNF CONCENTRIC HOLE |
| CMLP | THREAD QUANTITY PER INCH | 16 |
| CQJX | NOMINAL THREAD SIZE | 0.437 INCHES CONCENTRIC HOLE |
| CWWR | INTERNAL THREAD CLASS | 2B CONCENTRIC HOLE |
| FEAT | SPECIAL FEATURES | INTERNAL THO IS LH |
| MATT | MATERIAL | STEEL OVERALL |
| STYL | STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| THSD | THREAD SERIES DESIGNATOR | UNF |
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