Nut Large flange distributes torque load and restricts compression of material. Spring steel washer maintains surface contact as material expands and contracts. Prevailing torque remains high even when connection is subject to vibration. Nylon Lock Nut Reusable due to elastic memory of the nylon.
Collar serves as liquid seal to help prevent thread corrosion.
Serrated Flange Nut Ratchet teeth on underside facilitate tightening and resist loosening. Flange base can span oversized clearance holes. Able to take higher tightening torque than a standard T-Nut. Flange Lock Nut Eliminates the need for separate assembly of washer and nut. Lock washer is free to turn.