Flat Washer, Fits Bolt Size 5/16 in ,Fiber 50 PK USS flat washers have a large, wider body. SAE flat washers are machined to a tighter specification and have a smaller outside diameter..
.Sheet Metal Screw, #12 x 1/2 in, 18-8 Stainless Steel Oval Head Phillips Drive, 50 PK Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood.
.Flat Washer, Fits Bolt Size #10 ,Steel Black Chrome Finish, 20 PK USS flat washers have a large, wider body. SAE flat washers are machined to a tighter specification and have a smaller outside diameter.
Machine screws are used in fastening nearly all types of hard materials.1/4"-20 x 3/4 in Combination Phillips/Slotted Truss Machine Screw, Zinc Plated Steel, 25 PK Commonly used with flat or lockwashers. Especially useful in metal-to-metal or where heavy duty fastening is required..