Two-Way Reversible Lock Nuts, also known as Centerlock Nuts, get their name because of their functionality and their ability to be used either top-up, or top-down (reversible). Two Way Lock Nuts feature indentations on the outside flats of the nut, which distort the internal threads to increase resistance against the mating part.
are available on the FCH Network with Imperial/US diameters that range from #1 to 3 and with Metric diameters that range from M4 to M24. The length of is usually measured from the point to the underside of the head.
are available on the FCH Network in materials that range from Steel to Silicon Bronze