This listing is for a threaded replacement trailer hub cap for 3500lb capacity 5 lug Vortex trailer hubs. Dexter Axle (previously Tie Down Engineering) manufactures Vortex trailer hubs with threaded ends. Rather than the press in dust caps, this replacement component, manufacturer PN 021-261-01, will thread into your trailer hub. This thread cap is made specifically for the Vortex brand hubs. We cannot guarantee its use on a different brand of threaded trailer hub. It would be recommended to verify that your trailers axle and hub assembly are Dexter or Tie Down Engineering brand, and that the hub is a Vortex-style hub.