| EXTERNAL PREBENT KEY ANGLE | 45.0 DEGREES NOMINAL | 
| EXTERNAL PREBENT KEY LENGTH | 0.062 INCHES MINIMUM AND 0.093 INCHES MAXIMUM | 
| EXTERNAL PREBENT KEY WIDTH | 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM | 
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM | 
| HOLE DIAMETER | 0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM | 
| MATERIAL THICKNESS | 0.1544 INCHES MINIMUM AND 0.1744 INCHES MAXIMUM | 
| MATERIAL | STEEL OVERALL | 
| OUTSIDE DIAMETER | 1.870 INCHES MINIMUM AND 1.890 INCHES MAXIMUM | 
| STYLE DESIGNATOR | KEY |