Papcolloy washers are alloy steel, grade 8 flat washers. They are used with grade 8 hex bolts, nuts and lock washers to achieve the maximum strength of a high strength clamping application. Yellow zinc plated fasteners have good corrosion resistant qualities and are a better choice for indoor, outdoor and industrial applications.
If there is an "(S)" in the part name, it indicates that it has a smaller O.D, compared to the "(L)" which indicates that it has a larger O.D
For the product numbers that are sold by weight, 5lbs or 40lbs the individual pieces that are contained within the package are approximate due to manufacturers making some flat washers/lock washers slightly thicker, or thinner.