Washers

	A Belleville washer is a conical shaped spring disc.	Used to maintain load or tension in bolted assemblies.
	A Beveled flat washer which can be square or circular with one bearing surface having an oblique angle.	Commonly used when fastening bolts through the flanges of "I" beams.
	A COUNTER SUNK finishing formed circular washer designed for use with flat or oval head screws.	Designed for accommodating the heads of countersunk screws.  It provides additional bearing area on the material being fastened and can be used to give a neat, finished appearance.
	A 436 hardened steel washer manufactured in accordance with ASTM Standard F436.	Designed for general-purpose mechanical and structural use with bolts, nuts, studs, and other internally and externally threaded fasteners.
	A Fender washer flat washer with significantly more surface area than a USS or SAE washer, but made from a thinner gauge steel than most flat washers.	Used where an extra wide bearing surface is required.  Originally designed for auto body work, they are also used in sheet metal, plumbing, and electrical work.
	The machine screw flat washer is the smallest type of flat washer with an outside diameter equal to slightly twice the size of the inside diameter.	Designed for use with machine screws in general industrial applications.
	SAE flat washer is similar to a USS washer, but with slightly smaller inside and outside diameters and made from thinner materials than USS washers.	Designed to meet the requirements in the field of automotive engineering.
	A Split Lock washer coiled, hardened, split circular washer with a slightly trapezoidal wire section.	Preferred lock washer for use with hardened bearing surfaces.    Applies greater bolt tension per unit of torque.  Provides a hardened bearing surface, creating more uniform torque control.  Provides more uniform load distribution.  Resists loosening cause d by vibration and corrosion.
	A Tooth lock washer hardened circular washer with twisted prongs or teeth protruding from the inside and/or the outer edges of the washer.	Internal tooth are preferred when a finished appearance is crucial since the teeth are hidden under the head of the screw.  External tooth offer greater locking efficiency since the teeth are on the largest radius and provide greater torsional resistance.  Combination tooth are used where a larger bearing surface is desired, where the hole is oversized or out of round, and for an optimum electrical connection.
	A USS flat washer is thin, flat, circular washer with a centrally located hole.	Designed to meet the majority of industrial applications in manufacturing, maintenance, and repair.