Lawn Boy Screw Grommet part# 604604 fits the opening in the deck that the mulching plate and bagger discharge chute mounting screws are installed. Following is a list of lawnmower models that use this grommet; 10227, 10247, 10249, 10250, 10252, 10304, 10307, 10313, 10357, 10360, 10360C, 10361, 10367, 10422, 10424, 10518, 10523, 10547, 10601, 10670C, 10671, 10672, 10683, and 10684. There may be models that use this part that we do not have listed here. Please refer to your owners manual or a parts breakdown for your model, to assure that this is the correct part for your machine, before you order.