Eight Pack 3 Eighths Inch By 4 Inch Trailer Coupler Pins Heavy Duty Wire Lock Pins For Towing Hitch Secure PTO Shaft Locking Pin Fits Trailers RVs Boats Farm Equipment

Premium 3/8 x 4 in Trailer Coupler Pins, Heavy-Duty Locking
✔️ 8-pack, 3/8 in (9.5 mm) dia x 4 in (101.6 mm) length

These heavy-duty trailer coupler pins are designed to secure hitch connections on trailers, RVs, boats, and farm equipment. They resist corrosion and perform under heavy loads, making them ideal for outdoor towing environments.

✅ 3/8 in diameter (9.5 mm) and 4 in length (101.6 mm) for a solid fit
✅ 8-pack provides ready-to-use spares and value
✅ Heavy-duty steel with corrosion-resistant coating for long outdoor use
✅ Easy installation, slides into coupler quickly to secure hitch
✅ Suitable for trailers, campers, boats, and farm equipment

💡 What is a trailer coupler pin used for in towing systems and how does a locking pin enhance safety?

- secure hitch connections and prevent accidental uncoupling during movement - compatible with standard 3/8 in pins used on trailers, RVs, boats - corrosion-resistant construction supports long outdoor use