Open-end bulge OE-style lug nut for trailer wheels using 1/2-20 wheel studs and a 60° conical seat. Designed for Boatmate trailer hubs/wheels that specify a 3/4 in (19 mm) wrench size and zinc-plated finish for corrosion resistance.

• Compatibility: Fits 1/2-20 studs. 60° conical (acorn) seat. Works with most Boatmate steel/aluminum trailer wheels requiring 3/4 in hex.


• What’s included: Single (1) lug nut.


• Specs: Thread 1/2-20 UNF. Hex 3/4 in (≈19 mm). Style bulge OE open-end. Finish zinc-plated.


• Install notes: Start by hand to avoid cross-threading. Tighten with a 3/4 in socket to the wheel/trailer OEM torque spec. Re-torque after 25–50 miles.