This package contains 25 stainless steel serrated flange nuts, each with a drive size of 1/2" and a thread size of 5/16-18. The nuts are designed with a wide flange at one end which acts as an integrated, non-spinning washer.
The serrations on the washer provide a locking characteristic, distributing the pressure of the nut over the part being secured and reducing the chance of damage or loos…