A flange nut gives a constructed-in washer (flange) that distributes the clamping load in excess of a broader region than a daily lock nut. The look would not demand a flat washer and is particularly the higher selection for an outsized or slotted hole. Development: Flange nuts are Employed in https://johnathansgowe.thezenweb.com/a-secret-weapon-for-step-bolt-66508206