there are two countersunk

and the flange features a seamless construction to be extra hygienic

Bradley S65-095C Sv Retrofit 1 C Shwr Replacement Part

Bradley P10-167 Lampholder Replacement Part for Bradley Washroom Accessory Products

Century AO Smith 146A Blower Motor, 1/6 HP, PSC, 1050 RPM, 115V Mounting-Recessed Mount there are two countersunkFeatures: Mounting rings included Item: Direct Drive Blower Motor, Motor Type: PSC, HP: 1 6, Nameplate RPM: 1050, Voltage: 115, Enclosure: Open, Rotation: CW, Hz: 60, Phase: 1, Speeds: 1, Bearings: Sleeve, Shaft Number: 1, Shaft Length: 4", Shaft Dia.: 0. 5", Ring to Ring Center: 4. 47", Thermal Protection: Yes, Cooling: Air Over, Capacitor: 5M 370V.