It also fits many other makes of PTO shafts clutches. 

Specifications: 

Outside Diameter:  4.75" (120.6mm)

Inside Diameter:  2.63" (66.7mm)

Thickness: 1/8" (3.2mm)

King Kutter 147122 or 140219

John Deere SW04542 

Other part Numbers: 

Eurocardan 1804000

Comer 180.014.019

OEM #19-413