Shaft, For Use With Grainger Item Number 3AXF2, 3C540A, Fits Brand Dayton/ FIRST END STYLE: 3 FLAT KEYWAY END SIMILARITY: NOT IDENTICAL SECOND END STYLE: 3 FLAT KEYWAY END ITEM IDENTIFICATION: FAN,VANEAXIAL, DAYTON ELECTRIC MFG CO., MODEL 3C504 FIRST END KEYWAY WIDTH: 0.4990 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM FIRST END KEYWAY DEPTH: 0.283 INCHES MINIMUM AND 0.289 INCHES MAXIMUM SECOND END KEYWAY WIDTH: 0.4990 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM SECOND END KEYWAY DEPTH: 0.283 INCHES MINIMUM AND 0.289 INCHES MAXIMUM