PS04921, UP04174.

New Old Stock (NOS). Specifications (Per Bearing): - Brand: INA USA / Schaeffler 

Dimensions: 3/8" Bore (ID) x 9/16" OD x 3/8" Width (9.525mm x 14.288mm x 9.525mm) 

Outdoor Power Equipment Cross-References: 

Fits Homelite, Ryobi, and Ridgid small engine part numbers PS04921, PS-04921, UP04174, and UP-04174 

(primarily used as a clutch drum sprocket needle bearing). 

Fits Chainsaw Models: 

Homelite: 20 w/cc, 23 AV, 27, D3300, Timberman, UT10803, UT10817, UT10868, UT10910, UT10945, UT10946.

Ryobi: RY74003D, RY74005D, RY74007D.

Industrial Cross-References: 

Torrington / Koyo B66, IKO BAM 66. 

Condition:

New Old Stock (NOS)