| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.310 INCHES MINIMUM AND 0.340 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM |
| AASK | HEAD STYLE | FLAT CHAMFER |
| AASL | HEAD DIAMETER | 0.295 INCHES MINIMUM AND 0.315 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM |
| AATN | SHOULDER DIAMETER | 0.216 INCHES MINIMUM FIRST SHOULDER AND 0.217 INCHES MAXIMUM FIRST SHOULDER |
| AATX | SHOULDER LENGTH | 0.310 INCHES MINIMUM FIRST SHOULDER AND 0.340 INCHES MAXIMUM FIRST SHOULDER |
| AHYM | NOMINAL THREAD DIAMETER | 0.190 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| CWYB | SHOULDER SHAPE | ROUND FIRST SHOULDER |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP E4340 OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
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