When drilling a pilot hole for a #8 standard wood screw in hardwoods, one should use an 11/64-inch tapered drill bit. A 5/32-inch bit should be used for drilling into softwoods.
When using square drive screws, a standard point drill bit should be used. Hardwoods require a 1/8-inch bit with softwoods needing a 7/64-inch bit. Both standard and square drive screw plugs should be pre-drilled with a 3/8-inch drill bit. The bit used can be either standard point or tapered. The screw size number generally indicates the diameter of the screw; the higher the number, the larger the screw's diameter.Learn More
Rotating a screw advances a spiraled incline into a surface. The head of a screw functions as a lever, while its threading is just a long incline that has been wrapped around a vertical shaft.Full Answer >
A screw is a fastener that has a ridge or thread encircling the entire length of the device, while a bolt has a smooth shaft and a threaded end. Screws have heads with a depression indicating the type of driver necessary for fastening. Bolt heads are manipulated with a wrench and often have hexagonal designs.Full Answer >
The zero error of a micrometer screw gauge occurs when the flat end of the screw touches the stud or anvil, and the gauge reads other than zero. If there is an error, it results in a positive or negative calculation. However, well-calibrated micrometers that are in good condition measure close to zero; and, they do not introduce a noticeable error.Full Answer >
To use a T-square, place it flat on a drawing board, secure it in place and use it in conjunction with other drawing tools to create the desired shape. The general usage of a T-square takes only a few minutes and requires the T-square, paper, a pencil and a drawing board. A square, triangle or French curve may be necessary for other shapes.Full Answer >