Century AO Smith 81 Blower Motor, 1/40, 1/60 HP, Split-Phase, 1550 RPM, 115V Washbar Stainless steel locking setscrews are

Stainless steel locking setscrews are used to secure the wall plates to the mounting brackets in the flanges and support arms

It's built to last longer with type 304 stainless steel

For outdoor air conditioning and refrigeration condensing units and heat pumps

They also feature verticle flutes

2500 RPM motor

Century AO Smith 81 Blower Motor, 1/40, 1/60 HP, Split-Phase, 1550 RPM, 115V Washbar Stainless steel locking setscrews areItem: Direct Drive Blower Motor, Motor Type: Split Phase, HP: 1 40, 1 60, Nameplate RPM: 1550, Voltage: 115, Enclosure: Open Vent., Rotation: CCW, Hz: 60, Phase: 1, Speeds: 2, Bearings: Sleeve, Shaft Number: 1, Shaft Length: 2. 5", Shaft Dia.: 0. 313", Thermal Protection: No, Cooling: Air Over.