| DISTANCE FROM HUB END TO FLANGE END | 1.063 INCHES NOMINAL BB END |
| ASA STANDARD CHAIN NUMBER | 40 |
| BOLT CIRCLE DIAMETER | 1.875 INCHES NOMINAL |
| BORE DIAMETER | 0.630 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| BORE LENGTH | 1.250 INCHES NOMINAL |
| BORE TYPE | STRAIGHT |
| COUNTERBORE DEPTH | 1.031 INCHES NOMINAL AND 0.375 INCHES NOMINAL |
| COUNTERBORE LOCATION | BB END |
| COUNTERBORE DIAMETER | 0.812 INCHES NOMINAL AND 1.562 INCHES NOMINAL |
| DESIGN FORM | PLAIN |
| FURNISHED ITEMS | COUNTERBORE |
| FACE WIDTH | 0.234 INCHES MINIMUM AND 0.297 INCHES MAXIMUM |
| FLANGE THICKNESS | 0.188 INCHES NOMINAL |
| FLANGE OUTSIDE DIAMETER | 2.250 INCHES NOMINAL |
| HARDNESS RATING TEST METHOD | ROCKWELL |
| HOLE LOCATION | ON SPROCKET FACE |
| HUB OUTSIDE DIAMETER | 1.875 INCHES NOMINAL AA END |
| OUTSIDE DIAMETER | 3.296 INCHES NOMINAL |
| OVERALL LENGTH | 1.469 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624, FS4140-CANCELED FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-624, FS4150-CANCELED FED SPEC 2ND MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 4150 |
| METALLIC HARDNESS RATING AND LOCATION | 26.0 ROCKWELL C MINIMUM BODY AND 32.0 ROCKWELL C MAXIMUM BODY |
| PITCH DIAMETER | 3.038 INCHES NOMINAL |
| PROTRUDING HUB CHARACTERISTIC | PLAIN |
| SECURING HOLE QUANTITY | 3 |
| SECURING LOCATION | BB END |
| SECURING METHOD | THREADED HOLE |
| SPECIAL FEATURES | TWO PROTRUDING KEYS 0.219 IN. LONG ON AA END,0.125 IN W 0.938 IN DIA COUNTERBORE RELIEF 1.031 FROM BB END |
| STYLE DESIGNATOR | PLAIN |
| SURFACE TREATMENT | PHOSPHATE |
| TEETH ROW QUANTITY | 1 |
| TEETH HARDNESS RATING | 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| TEETH QUANTITY PER ROW | 19 |
| THREAD SIZE | 10-32 |
| TOOTH PITCH | 0.500 INCHES NOMINAL |