SAE flat washers are machined to a tighter specification and have a smaller outside diameter.Flat Washer, Fits Bolt Size M12 ,18-8 Stainless Steel 25 PK USS flat washers have a large, wider body..
.Self-Drilling Screw, #6 x 1/2 in, Zinc Plated Steel Hex Head Hex Drive, 50 PK Ideal for any project involving light gauge sheet metal, awnings, door and window frames, gutters, sheds.
. Machine screws are used in fastening nearly all types of hard materials.#8-32 x 1 in Phillips Flat Machine Screw, Plain Stainless Steel, 25 PK Commonly used with flat or lockwashers.
Especially useful in metal-to-metal or where heavy duty fastening is required.#10-24 x 1-1/2 in Slotted Round Machine Screw, Zinc Plated Steel, 24 PK Commonly used with flat or lockwashers. Machine screws are used in fastening nearly all types of hard materials.