| DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY | 0.370 INCHES NOMINAL |
| ANGLE BETWEEN EXTERNAL KEYS | 60.0 DEGREES NOMINAL |
| EXTERNAL PREBENT KEY ANGLE | 15.0 DEGREES NOMINAL |
| EXTERNAL PREBENT KEY LENGTH | 0.140 INCHES NOMINAL |
| EXTERNAL PREBENT KEY WIDTH | 0.140 INCHES NOMINAL |
| EXTERNAL TAPERED KEY WIDTH | 0.320 INCHES NOMINAL |
| HOLE DIAMETER | 0.390 INCHES MINIMUM AND 0.395 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | BS S521 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL THICKNESS | 0.032 INCHES NOMINAL |
| III MATERIAL | STEEL OVERALL |
| OUTSIDE DIAMETER | 0.560 INCHES MINIMUM AND 0.570 INCHES MAXIMUM |
| STYLE DESIGNATOR | 270 DEGREE LOCKING KEY |