Fasteners, joints.

Fasteners

We use ordinary household appliances in our everyday life. Joint compound are used to tie two or more materials together in those appliances. The joints are divided into two types:

1. Permanent joints - welding joints, riveted joints. These joints will damage both joint and the joint compound.
2. Non-permanent joints - fasteners are usually used for the non-permanent joints. It will not damage the joint and the joint compound. Nuts and bolts, clamps and screws are some examples for the fasteners.

	Nail	Screw	Bolt with nut and washer	Clamp
Material used	Iron, galvanized iron, stainless iron	Stainless steel, brass, titanium and bronze	Carbon steel, alloy steel, boron steel	Brass, stainless steel
Usage	Usually used in wood joins	Usually used to connect wood compounds	Usually used to connect the steel compounds	Usually used in carpentry, welding and piping industry
Types of fasteners	Common nails, roofing nails, casting nails, finishing nails, etc.	Recess type, head type, thread type and point type	Compression bolt, self-drilled bolt, wedge bolt, sleeve bolt	c-clamps, bar clamps, pipe clamps
Strength	Not good for high loading joints usually used to resist the shear	Used for simple joints	Used to resist the shear and tension joints	Used to resist the compression and shear
Durability	Short term, difficult to remove	Higher than nails. Easy to remove	Higher than screw. Easy to remove	Higher than bolts, very easy to fix and remove