---
product_id: 13417353
title: "CURT 25010 Trailer Coupler Pin, 5/16-Inch Diameter x 3-Inch Long"
brand: "curt"
price: "€ 5.17"
currency: EUR
in_stock: true
reviews_count: 13
category: "Curt"
url: https://www.desertcart.gr/products/13417353-curt-25010-trailer-coupler-pin-5-16-inch-diameter-x
store_origin: GR
region: Greece
---

# 5/16-inch diameter for universal fit 3-inch solid steel pin for max strength Zinc-plated corrosion resistance CURT 25010 Trailer Coupler Pin, 5/16-Inch Diameter x 3-Inch Long

**Brand:** curt
**Price:** € 5.17
**Availability:** ✅ In Stock

## Summary

> 🔒 Lock in your adventure with CURT’s ultimate trailer safety pin!

## Quick Answers

- **What is this?** CURT 25010 Trailer Coupler Pin, 5/16-Inch Diameter x 3-Inch Long by curt
- **How much does it cost?** € 5.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/13417353-curt-25010-trailer-coupler-pin-5-16-inch-diameter-x)

## Best For

- curt enthusiasts

## Why This Product

- Trusted curt brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rust? Not Here.:** Durable zinc plating guards against corrosion, keeping your pin looking and performing like new.
- • **Lifetime Confidence:** Backed by a limited lifetime warranty, this pin is your long-term towing partner.
- • **Rock-Solid Security:** Solid steel construction ensures your trailer latch stays locked tight, mile after mile.
- • **Effortless Operation:** Spring steel square retainer clip offers easy, vibration-proof locking without fumbling.
- • **Universal Fit, Zero Hassle:** Fits a wide range of trailer couplers, jacks, and pintle hooks with precision 5/16" diameter and 3" length.

## Overview

The CURT 25010 Trailer Coupler Pin is a 5/16-inch diameter by 3-inch long solid steel pin, zinc-plated for corrosion resistance. Designed for versatile use across trailer couplers, jacks, and pintle hooks, it features a spring steel square retainer clip for secure, vibration-free locking. Trusted by professionals and backed by a limited lifetime warranty, it ensures reliable, rust-free towing security every time.

## Description

CURT safety pins go beyond the simple function of keeping your coupler latch secure. They are constructed from quality materials and have a universal design that allows them be used for a variety of purposes in your towing setup. CURT safety pins are made from solid steel to provide more than enough strength to keep your trailer coupler latched down tight. The zinc plating that we use to finish our safety pins offers excellent protection against rust and corrosion. This is necessary for any trailer because of its frequent exposure to the elements. The user-friendly design of our safety pins allows them to be easily handled while maintaining effective security. This safety pin has a pin diameter of 5/16". CURT safety pins can also be purchased with a 12" chain attachment to mount onto your trailer coupler and prevent the safety pin from being misplaced. Use CURT safety pins for securing trailer couplers, jacks, caster wheels and more. When you couple your trailer to your vehicle, nuts and bolts just do not cut it. Secure your towing equipment right with a safety pin from CURT.

Review: Great product and price. - Great product and price. Works well.
Review: Nice product - I bought these for a delivery box. They were nice quality and probably would have worked if I had ordered the right size. Lol. Had to return but had they fit they would have been great I'm sure

## Features

- VERSATILE. The 5/16-inch diameter and 3-inch length of this coupler safety pin make it highly versatile to fit a wide variety of trailer couplers. It can also be used for a trailer jack wheel, pintle hook and more
- SECURE. This coupler safety pin provides a reliable solution for keeping your trailer coupler latch engaged with the trailer ball. The solid pin offers ample strength while the retainer clip ensures the pin will not vibrate or rattle free
- EASY TO USE. The square retainer clip of this trailer coupler pin is made with spring steel, making the clip semi-flexible for easy operation. With the safety pin inserted in the coupler latch, the square retainer easily clips on to the end of the pin
- CORROSION-RESISTANT. Protected by a durable zinc-plated finish, this coupler safety pin maintains excellent resistance to rust and corrosion for longevity and hassle-free use every time
- HIGH-STRENGTH. The 5/16-inch trailer coupler pin is made out of solid steel for reliable strength, safety on the road and confidence with every mile of your adventure

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001GN6YS2 |
| Best Sellers Rank | #36,160 in Automotive ( See Top 100 in Automotive ) #33 in Trailer Coupler Parts |
| Brand | CURT |
| Color | SILVER |
| Compatible Groove Diameter | 0.31 Inches |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,440) |
| Fastener Type | Coupler Pin |
| Finish Types | Zinc-plated |
| Global Trade Identification Number | 00612314610013 |
| Included Components | 5/16" Safety Pin |
| Item Diameter | 0.31 Inches |
| Item Dimensions | 7 x 2 x 2 inches |
| Item Type Name | Trailer Coupler Pin, 5/16-Inch Diameter x 3-Inch Long |
| Item Weight | 1.6 ounces |
| Manufacturer | Curt Manufacturing |
| Material Type | Alloy Steel, zinc plated |
| Maximum Shear Strength | [HIGH] |
| Number of Pieces | 1 |
| Pin Type | Coupler Pin |
| Screw Head Style | Square |
| Size Name | 5/16-inch x 3-inch |
| UPC | 612314610013 |
| Unit Count | 1.0 Count |
| Warranty Description | Limited Lifetime |

## Product Details

- **Brand:** CURT
- **Item Diameter:** 0.31 Inches
- **Material:** Alloy Steel, zinc plated
- **Pin type:** Coupler Pin
- **Size:** 5/16-inch x 3-inch

## Images

![CURT 25010 Trailer Coupler Pin, 5/16-Inch Diameter x 3-Inch Long - Image 1](https://m.media-amazon.com/images/I/61wmaV5IwQL.jpg)

## Questions & Answers

**Q: Are these really 5/16" diameter?  I just bought the 1/4" pins but they were only 3/16" diameter.**
A: yes.

**Q: whats the shear rating?**
A: The shear strength is virtually irrelevant. There is next to no force against it by the lever. It just keeps the lever from popping up. A good twig or wood dowel could do the same thing.

**Q: What is the shear rating? I would be using this in pla e of a bolt un a weight lifting bench.  The rack is supposed to hold 600 pounds.**
A: This pin is only used to "lock" the clamping mechanism and as such has no relative shear rating.

**Q: what is the dimension from the shaft  to the wire (looking for clearance of 1-3/4" )?**
A: From the Amazon Product Dimensions: 7 x 2 x 2 inches.  The 5/16" shaft would make the gap less less than the 1-3/4" you need, but you could bend the wire part as needed.  It's really flexible and easy to bend.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product and price.
*by J***P on August 25, 2025*

Great product and price. Works well.

### ⭐⭐⭐⭐⭐ Nice product
*by J***S on April 29, 2025*

I bought these for a delivery box. They were nice quality and probably would have worked if I had ordered the right size. Lol. Had to return but had they fit they would have been great I'm sure

### ⭐⭐⭐⭐⭐ Perfect fit
*by A***Y on August 7, 2024*

Used these to secure loading ramps to the edge of my trailer. Ramps have flat tabs to handle the weight of the ATV being loaded, but no way to secure the ramps from sliding out, drilled a 5/16” hole through the ramp and back edge of trailer and used one of these on either side and solved my problem! A simple bolt would have worked but I enjoy the fact that these can be secured to the trailer for safekeeping even when ramps aren’t attached.

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**Shop now:** [https://www.desertcart.gr/products/13417353-curt-25010-trailer-coupler-pin-5-16-inch-diameter-x](https://www.desertcart.gr/products/13417353-curt-25010-trailer-coupler-pin-5-16-inch-diameter-x)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-06-06*