Massey Ferguson 25 37 585 Bar Hay Rake Cam Follower Bearing 581318M91 TB7623
 
OD: 1-7/8", OL: 2-1/8", Thread length: 1-1/2", Thread: 3/4".
Fits rakes:
25 (SN 419012167>)
37 (SN 1283005190>)
585, 588
Some of these rake models take a bearing and a separate bolt to attach, this will not fit those rakes this has the bolt attached to the bearing. 

Replaces:IH ST437, TB7623, Vermeer 1738001, New Holland 48138, Massey Ferguson 58131M91