6 Pack Trailer Coupler Pins 5-16 Inch By 4 Inch Heavy Duty Square Towing Hitch Pins For Trailer Safety Lawn Mower Hitches Locking Wire Pins And PTO Shaft Locks Durable Carbon Steel

Six-Pack 5/16x4 in Trailer Pins (7.9 mm x 101.6 mm)
✔️ 6 pcs, 5/16 in dia (7.9 mm), 4 in long, carbon steel

These heavy-duty trailer coupler pins are built from carbon steel to secure hitch connections across trailers, lawn equipment, tractors, ATVs, and more. The 6-piece set fits most standard couplers and provides reliable security in towing applications.

✅ 6 pieces: 5/16 in diameter (7.9 mm), 4 in length (101.6 mm)
✅ Carbon steel construction for strength and durability
✅ Rust-resistant finish for outdoor towing
✅ Fits most trailer couplers, hitch pins, and PTO setups
✅ Includes 6 pins for easy replacements

💡 What is a trailer coupler pin used for and why pick a 5/16 x 4 inch size?

It's handy for securing hitch connections on trailers, lawn gear, and farm equipment.

- Keeps mating components aligned and secure during towing - Works with common coupler sizes and is easy to insert or remove - Carbon steel provides strength and corrosion resistance - Sold as a 6-pack for ready replacements