Pack of 20 Square Trailer Pins – 2-3/4" x 1/4" (L x W)

PINAILER Pack of 20 square trailer pins are 2-3/4" long, 1/4" thick, zinc-plated carbon steel locking pins designed to secure coupler latches and small towing connections.

These compact trailer hitch pins are a straightforward, heavy-duty fastener for keeping coupler latches engaged with the trailer ball or other small attachment points. Sold in a 20-count kit, each pin uses a square cross-section and includes a retaining clip for quick installation and removal. The zinc plating and carbon-steel core give corrosion resistance and enough rigidity to resist bending in common towing and agricultural tasks.

How do these square trailer pins fit standard coupler latches?

Each PINAILER pin measures 2-3/4" in length and 1/4" in diameter, dimensions that match many coupler latch holes and small hitch hardware. The square shaft profile reduces rotation inside the hole, keeping connections stable under vibration. The included clip holds the pin in place without tools.

• Length: 2.75 inches (exact measurement for many small couplers)
• Thickness: 0.25 inches diameter for common hitch holes
• Square shape: minimizes twisting in service
• Retaining clip: fast tool-free locking and release

What materials and protection do these pins use against rust?

PINAILER pins are made from quality carbon steel and finished with zinc plating to slow oxidation when exposed to road spray and weather. Zinc plating is a practical corrosion barrier for general towing use and outdoor storage. While not stainless, the finish extends service life compared with bare steel pins.

• Core: high-strength carbon steel for rigidity
• Finish: zinc plating for rust resistance
• Durability: resists common corrosion for outdoor applications
• Maintenance: simple wipe-clean to remove surface grime

Can these pins be used beyond trailer couplers?

Yes. The semi-rigid locking shaft and universal size make these pins useful for a variety of fastening tasks—farm implements, pallets, machinery guards, and DIY projects. Their compact size is ideal where a short, sturdy pin and quick-release clip are needed. They provide a low-cost, versatile solution whenever a removable fastener is required.

• Common uses: agricultural implements, gate latches, utility carts
• Workshop use: jigs, fixtures, or temporary assemblies
• Outdoor gear: compact, removable fasteners for accessories
• Count: 20 pins per pack for multi-point installations

Who is this for? PINAILER's Pack of 20 square trailer pins suits vehicle owners, landscapers, farmers, and handypersons who need an affordable, repeatable fastening method for small couplers and equipment. If you tow small trailers, maintain farm machinery, or build fixtures that require frequent pin removal, this 20-pack gives spare parts and backups so one lost pin doesn't stop the job. Choose these pins when you want straightforward installation, reliable holding, and corrosion-resistant carbon steel at a value quantity.