SAE flat washers are machined to a tighter specification and have a smaller outside diameter.Flat Washer, Fits Bolt Size M16 ,Steel Zinc Plated Finish, 10 PK USS flat washers have a large, wider body..
.A coupling nut is a long nut tapped from each side to meet in the middle, rather than all the way through in the same direction, used to connect two threaded rods end to end.
Sheet Metal Screw, #8 x 1/2 in, Painted Steel Hex Head Slotted Drive, 40 PK Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood..
Sheet Metal Screw, #14 x 2 in, Zinc Plated Steel Pan Head Combination Drive, 100 PK Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood..