| EXTERNAL PREBENT KEY WIDTH | 0.300 INCHES MINIMUM AND 0.328 INCHES MAXIMUM | 
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM OR 35.0 ROCKWELL C MAXIMUM | 
| HOLE DIAMETER | 0.276 INCHES MINIMUM AND 0.296 INCHES MAXIMUM | 
| MATERIAL THICKNESS | 0.125 INCHES NOMINAL | 
| MATERIAL | STEEL COMP 4130  OR STEEL COMP 4140  OR STEEL COMP 8630 OVERALL | 
| OUTSIDE DIAMETER | 0.717 INCHES MINIMUM AND 0.734 INCHES MAXIMUM | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633, TY2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | 
| SURFACE TREATMENT | ZINC  AND CHROMATE OVERALL |