| ASA STANDARD CHAIN NUMBER | 25 |
| BORE TYPE | SQUARE |
| DESIGN FORM | PLAIN |
| DISTANCE FROM HUB END TO FLANGE END | 0.150 INCHES NOMINAL BOTH ENDS |
| FACE WIDTH | 0.110 INCHES NOMINAL |
| HARDNESS RATING TEST METHOD | ROCKWELL |
| HUB OUTSIDE DIAMETER | 0.680 INCHES NOMINAL BOTH ENDS |
| INSIDE WIDTH ACROSS FLATS | 0.3125 INCHES MINIMUM AND 0.3145 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.729 INCHES NOMINAL |
| OVERALL LENGTH | 0.260 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 630 |
| METALLIC HARDNESS RATING AND LOCATION | 40.0 ROCKWELL C MINIMUM HUB AND 46.0 ROCKWELL C MAXIMUM HUB |
| PITCH DIAMETER | 1.598 INCHES NOMINAL |
| PROTRUDING HUB CHARACTERISTIC | PLAIN |
| STYLE DESIGNATOR | PLAIN |
| SURFACE TREATMENT | PASSIVATE |
| TEETH ROW QUANTITY | 1 |
| TEETH HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| TEETH QUANTITY PER ROW | 20 |
| TOOTH PITCH | 0.250 INCHES NOMINAL |