| MRC | Criteria | Characteristic |
|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.815 INCHES MINIMUM AND 0.865 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 2.825 INCHES MINIMUM AND 2.855 INCHES MAXIMUM |
| AASK | HEAD STYLE | DISHED HEXAGON |
| AASU | HEAD HEIGHT | 0.281 INCHES MINIMUM AND 0.296 INCHES MAXIMUM |
| AATB | WIDTH BETWEEN FLATS | 0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM |
| AAUR | GRIP DIAMETER | 0.5605 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM |
| AHYM | NOMINAL THREAD DIAMETER | 0.562 INCHES |
| ANEE | GRIP LENGTH | 1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 18 |
| CQBC | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| CQFM | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| MATT | MATERIAL | STEEL COMP 4140 OVERALL OR STEEL COMP E4340 OVERALL OR STEEL COMP 6150 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 8740 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OVERALL OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TY2, CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
| ZZZK | SPECIFICATION/STANDARD DATA | 80205-NAS1309 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
