Fasteners 6831 21 Nails Metal fasteners driven into

Fasteners 6831. 21

Nails • Metal fasteners driven into the material it holds

Nails • Common nails are used for general construction and have a flat head and diamond shaped point

Common Nails • Used for construction such as framing because of their heads and size of shank

Nails • Finishing nails have small heads that can be set below surface

Finishing Nails • Used for trim because of small heads that can be countersunk below surface of wood

Nails • Brads are thin, short nails with small heads

Nails • Cut or casing nails are square on the ends and are used for tongue an groove board nailing

Casing Nails • Used to fasten tongue and groove boards and to nail some trim work

Nails • Others: roofing, box, staple, duplex

Spiral Groove Nails • Used to fasten metal on roofs because the nails are less likely to work loose and cause leaks

Screws • Fasteners with threads that bite into the material they fasten

Screws • Kind based on material they hold – wood, sheet metal, drywall, etc.

Screws • Kind based on metal they are made from – steel, brass, etc.

Screws • Kind based on shape of head – flat, round, oval, pan, etc.

Flathead and Roundhead Screws • Used to fasten wood to wood

Countersink • A countersink cuts a “V” in the surface of wood so that a flathead screw will be flush or just below surface

Countersink • Roundhead screws will be above surface unless a hole is drilled deep enough to hide head of screw

Screws • Size is determined by diameter (gauge) and length (inches) of the shank

Bolts • Fasteners that require a threaded nut

Bolts • A lag bolt is sometimes called a lag screw because it has threads similar to a wood screw and does NOT use a nut

Lag Screws • Are used with expansion shields to fasten wood to masonry materials such as concrete, bricks, or blocks

Bolts • A carriage bolt has a round head over a square shank or shoulders

Carriage Bolt

Bolts • A stove bolt may have either a round head or a flat head and the shank is threaded the entire length from bottom to top

Stove Bolt

Stove Bolts • Are used to fasten lightweight metal structures

Bolts • A machine bolt has either a square head or a hex head and is threaded on the bottom for about 1” • It is NOT threaded all the way to the top

Machine Bolts • Are used when a strong bolt is needed, but it needs to be removed to dismantle metal equipment on a regular basis

Bolts • A cap screw is much like a machine bolt but has threads the entire length, is usually 2” or less in length, threads into something other than a nut, and may have different kind of head

Fasteners 6831. 21