| MRC | Criteria | Characteristic |
|---|---|---|
| AHML | HEAD THICKNESS | 0.562 INCHES MINIMUM AND 0.624 INCHES MAXIMUM |
| SFTT | SURFACE TREATMENT | NICKEL AND CHROMIUM OVERALL |
| ABMK | OVERALL WIDTH | 0.680 INCHES MAXIMUM |
| STYL | STYLE DESIGNATOR | BOX |
| MARK | SPECIAL MARKINGS | 7/16 IN. WR SIZE |
| MATT | MATERIAL | STEEL COMP 4340 OVERALL |
| ABHP | OVERALL LENGTH | 1.151 INCHES MAXIMUM |
| ATNC | DRIVE SURFACE SIZE | 0.250 INCHES NOMINAL SINGLE END |
| AJBR | WRENCHING SURFACE SIZE | 0.438 INCHES NOMINAL SINGLE END |
| ABPP | OPENING WIDTH | 0.270 INCHES MINIMUM |
| CRWY | WRENCHING SURFACE SHAPE | 12 POINT SINGLE END INTERNAL |
| CTCT | DRIVE END SHAPE | SQUARE SINGLE END INTERNAL |
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