The pitch diameter of the M5 is 4.48mm, and the pitch is 0.8mm. The pitch diameter of the 10-32 is 4.31mm, and the pitch is 0.79mm. The SAE bolt is less than 5% smaller and has a less than 1% tighter pitch. A 10-32 bolt will thread but not hold into an M5 nut. They can be used together, but torque them evenly to prevent stripping the threads.
The M5 hole in wood is usually about 1.25 inches (3cm) deep, while the 10-32 hole is usually about 1 inch (2.5cm) deep. If you were to use an M5 screw to fasten two pieces of wood together, then it should be screwed into a wood surface that is at least 1.25 inches (3cm) deep. If the piece of wood being joined to is less than 1.25 inches (3cm) thick, then another piece of wood should be placed under the portion that's less than 1.25 inches (3cm) thick to keep it from bending.
Screws with larger heads tend to create more dust when they are driving in a screw. This is particularly true for metal screws. Smaller head screws can be used instead, but they won't grip as well and may work their way out of the wood if not applied carefully. Also, if you plan to paint or stain your project later, make sure to select paint/stain types that are compatible with the materials used in your furniture.
The diameter, pitch, and length of a metric screw or bolt are all stated in millimeters (millimeters are abbreviated "mm"). Size will display as diameter and pitch for nuts. 3. Table
Metric | Closest Inch |
---|---|
M8-1.25 | 5/16-18 (Smaller) |
M10-1.5 | 3/8-16 (Smaller) |
M12-1.75 | 1/2-13 (Larger) |
M14-2.0 | 9/16-12 (Larger) |
The diameter, pitch, and length of a metric screw or bolt are all stated in millimeters (millimeters are abbreviated "mm"). Size will display as diameter and pitch for nuts. 3. Table
Metric | Closest Inch |
---|---|
M6-1.0 | 1/4-28 (Larger) |
M7-1.0 | 1/4-28 (Smaller) |
M8-1.25 | 5/16-18 (Smaller) |
M10-1.5 | 3/8-16 (Smaller) |
M8 is the metric (M) designation for an 8 mm diameter bolt or screw. This is around the size of a 5/16 bolt or screw. A M8 socket fits over the head of a M8 bolt and has eight slots to accept the threads.
M8 is a common thread size used in plumbing and electrical work because it can be found almost anywhere if you look hard enough. It's also known as quarter-inch threading, but that's actually the name given to the whole series of 1/4 inch thread sizes starting with M8.
Although not commonly used any more, M8 bolts are still available from home improvement stores and some hardware markets. They're usually sold in boxes of 100 pieces and each piece has two threads on one end and four threads on the other. That means you need two pieces of M8 bolt to make one full bolt.
The old term for a socket designed to fit a M8 bolt was "quarter-turn" because you need to rotate the socket 360 degrees to fully cover the thread with plastic. This is different from half-turn sockets which only require 180 degree rotation to engage them all the way.