Washers
Machine Screw Flat Washers - are the smallest type of flat washer with an outside diameter equal to slightly twice the size of the inside diameter
Countersunk Finishing Washers - are a formed circular washer designed for use with 82°countersunk flat or oval head screws. The washer provides additional bearing area on the material being fastened and can be used to give a neat, finished appearance. Supplied with nickel plating
Fender Washers - are flat washers with significantly more surface area than a USS or SAE washer. They are also made from a thinner gauge metal than most flat washers. Used where an extra wide bearing surface is required. Originally designed for auto body repair work, they are also used in sheet metal, plumbing,and electrical work. Also used to attach signs to posts and install drywall and wood paneling
Grade 8 Hardened Flat Washers - are dimensionally similar to their USS washer counterparts, but with tighter tolerances on thickness, and manufactured from a higher grade of steel. They are to be used specifically with high-strength hardened steel bolts
Split Lock Washers - A 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 and load distribution. Resists loosening caused by vibration and corrosion
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