Used on hemtt family (heavy expanded mobility tactical trucks); 2320-01-304-2277 and 2320-01-304-2278 pls (palletized loading system); 2330-01-303-5197 pls trailer. also 2320-01-318-9902 het (heavy equyipment transporter).. 3/4 flanged hex nut for use only on accuride wheel assemblies