| MRC | Criteria | Characteristic |
|---|---|---|
| AASB | FASTENER LENGTH | 4.000 INCHES NOMINAL |
| AASK | HEAD STYLE | SQUARE |
| AASU | HEAD HEIGHT | 0.297 INCHES NOMINAL |
| AATB | WIDTH BETWEEN FLATS | 0.625 INCHES NOMINAL |
| CQBC | MINIMUM TENSILE STRENGTH | 70000 POUNDS PER SQUARE INCH |
| CRGF | NONMACHINE THREAD STYLE | GIMLET POINT (TYPE A, AB OR BA) |
| CTYF | NONMACHINE NOMINAL THREAD DIAMETER | 0.438 INCHES |
| MATT | MATERIAL | STEEL COMP 302 OVERALL OR STEEL COMP 303 OVERALL OR STEEL COMP 304 OVERALL OR STEEL COMP 305 OVERALL OR STEEL COMP 310 OVERALL OR STEEL COMP 316 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| SFTT | SURFACE TREATMENT | ZINC OVERALL |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 2 STYLE AND C GRADE |
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