| DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY | 0.700 INCHES MINIMUM AND 0.710 INCHES MAXIMUM |
| EXTERNAL KEY QUANTITY | 1 |
| EXTERNAL PREBENT KEY ANGLE | 43.0 DEGREES MINIMUM AND 47.0 DEGREES MAXIMUM |
| EXTERNAL PREBENT KEY LENGTH | 0.100 INCHES NOMINAL |
| EXTERNAL PREBENT KEY WIDTH | 0.200 INCHES MINIMUM AND 0.210 INCHES MAXIMUM |
| HOLE DIAMETER | 1.250 INCHES MINIMUM AND 1.260 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ROYAL ORDNANCE PLC DD/TS/0221/90 GROUP 1(A) MFR REF SINGLE MATERIAL RESPONSE |
| MATERIAL THICKNESS | 0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM |
| III MATERIAL | STEEL |
| OUTSIDE DIAMETER | 1.590 INCHES MINIMUM AND 1.600 INCHES MAXIMUM |
| STYLE DESIGNATOR | KEY |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ROYAL ORDNANCE PLC DD/TS/0221/90 GROUP 20(A) MFR REF SINGLE TREATMENT RESPONSE |
| SURFACE TREATMENT | PHOSPHATE |