A flange nut offers a constructed-in washer (flange) that distributes the clamping load above a wider space than a regular lock nut. The look doesn't demand a flat washer and is the higher option for an outsized or slotted hole. Carriage bolts fasten metal pieces to metal pieces or metallic https://caidenldrfw.ttblogs.com/7748362/the-basic-principles-of-flange-bolts