Part RC-025-A Aluminum Rigid Coupling, 1/4 inch bore, 1/2 inch OD, 3/4 inch Length, 10-32 x 1/8 Set Screw

Climax Metals RC-025-A Aluminum Rigid Coupling, 1/4" Bore, 1/2" Outside Diameter, 3/4" Length, #10-32 x 1/8" Set Screw

Fasco D637 Motor | 1/75 HP 1550 RPM 115V 3.3" Dia. CCW Rotation Nutone Bath Fan Motor

EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm)