This is a A-RC50 50 Roller Chain, 10ft (Drives) PN: RC50Main Description As Following : A-RC50 50 Roller Chain, 10ft (USA) P.N: RC50 B1: 3/8"D1: 13/32"Links Per 10 Feet: 192P: 5/8"Replaces: 623836R91, 617964R91, 578924R91, 578731R91, 561429R92, 450444R91, 362268R91, H757377, H753129 Replaces: SW50X10US JOHN DEERE , TC50 *** NO CLASS *** , 1791D IH COMBINE , Crossed From: AP22459 JOHN DEERE , ARC50 , , CV105059 VAPORMATIC , RC50P , , WN-RC50 , , WNRC50 , , 2221-43421 JOHN DAY , 362268R91 CASE-IH , 450444R91 CASE-IH , 561429R92 CASE-IH , 578731R91 CASE-IH , 578924R91 CASE-IH , 617964R91 CASE-IH , 623836R91 CASE-IH , 803-10500010 , , 80310500010 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Roller Chains and Attachment Links, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Links Per 10 Feet: 192 Pin Diameter: .200" Pitch Length: 5/8" Replaces: 623836R91, 617964R91, 578924R91, 578731R91, 561429R92, 450444R91, 362268R91, H757377, H753129 Width: 3/8"