http://site.electricsuppliesonline.com/documents/westinghouse/ceiling-fan/westinghouse-bracket.pdf Web99% of all screws used for electrical boxes in America should be 8/32 and covers for light switches are 6/32. Your box appears to have two sheared off screw remnants in the holes shown. You should try the other two provided. Edit: upon looking further into your photos provided. The holes are trashed, stripped out, sheared.
Ceiling electrical box rated for fan, and type of screws
WebCiata Ceiling Fan Mounting Bracket, Heavy Duty Metal Mounting Saf-T-Brace with Locking Teeth, 3 Teeth for Lock into Joist, Twist and Lock with 1-1/2 Inch Ceiling Fan Box Mount, Light Electrical Box - 3 Pack 103 $6299 FREE delivery Mon, Jan 23 Or fastest delivery Fri, Jan 20 Small Business More Buying Choices $58.99 (4 used & new offers) http://www.aifittings.com/landing/fbb450-fbb900/ bus spotting hobby
Twist LED Smart Ceiling Fan by Minka Aire Fans at Lumens.com
WebAir Balance Fan Design 120mm Air Balance fan's silent driver IC smoothens fan operation, reducing fan clicks and vibrations. ... Twist and Play Get a screwdriver, and you can have this thing running in five minutes. ... Fan Rated Voltage: 12 VDC: Pump Dimensions: 80.3 x 76 x 42.2 mm / 3.2 x 3.0 x 1.7 inch: Pump MTTF: 70,000 Hours: Pump Noise ... http://www.aifittings.com/catalog/fan-fixture-boxes/l-shaped-fan-and-fixture-mounting-boxes/ WebThe Saf-T-Brace features a heavy-duty, 1-1/2 inch, all-metal electrical box, with 15.5 inch wiring capacity and dual mounting capability for lightweight or heavier fans and fixtures. For fixture support up to 150 pounds on 16 … c.c.catch - heartbeat city maxi mix mp3