The standard TV mounting bolt size for most television sets is M8, which means the bolt has an 8mm diameter.
When choosing a bolt for a TV mount, look for one that is the same size as the mounting holes on the back of your TV. Typically, a 6mm or 8mm bolt is commonly used for most TV mounts. Be sure to check the specifications of your specific TV mount to ensure you are using the correct size bolt.
Most backboard-to-support bolt patterns SEEM to be 35" w x 20"h
When I mounted my TV at home, I had the same question, especially since I was working with a 65 Inch TV Wall Mount. The recommended bolt size often depends on the VESA pattern of your TV and the type of wall you’re mounting it on. For most 65-inch TVs, the standard bolts are usually M8 screws, and their length can vary depending on the thickness of your wall bracket and whether you’re mounting into drywall with studs or directly into concrete/brick. In my case, I used M8 x 45mm screws, which worked perfectly with the provided spacers and bracket. That said, I’d always suggest double-checking your TV’s manual, because manufacturers sometimes specify the exact bolt size needed for safe installation. If you’re unsure, a mounting kit for a 65 Inch TV Wall Mount usually comes with multiple screw sizes, so you’ll have options on hand.
The standard tripod mounting screw size for most cameras is 1/4 inch.
The standard bicycle crank bolt size for most bikes is 14mm.
The standard tripod bolt size for most camera tripods is 1/4 inch.
The standard bike pedal bolt size for most bicycles is 9/16 inch.
Virtually all televisions today have a removable base. Most bases use a non-standard mounting system so you will need to read the manual to confirm the removal method. Similarly, virtually all have a "VESA" standard mount on the rear of the case to allow a wall mount to be fitted. There are several different sizes of VESA mount so it is important that you read the manual to find out which size is needed. The VESA standard mounting system uses 4 screws in a square shape so it is easy to recognize in the rear of the television.
The standard camera screw size used for mounting accessories on most DSLR cameras is 1/4"-20.
Most TV brackets are screwed to the wall.
The standard m5 bolt diameter used in most industrial applications is 5 millimeters.
The standard toilet bolt size for most toilets is 5/16 inch in diameter and 3.5 inches in length.