---
product_id: 148288744
title: "National Hardware N222-174 2190BC U Bolt in Zinc plated,#536-5/16\"x2\"x4-1/2\""
brand: "national hardware"
price: "1786 kr"
currency: ISK
in_stock: true
reviews_count: 8
url: https://www.desertcart.is/products/148288744-national-hardware-n222-174-2190bc-u-bolt-in-zinc-plated
store_origin: IS
region: Iceland
---

# 5/16" diameter Durable steel wire Zinc plated National Hardware N222-174 2190BC U Bolt in Zinc plated,#536-5/16"x2"x4-1/2"

**Brand:** national hardware
**Price:** 1786 kr
**Availability:** ✅ In Stock

## Summary

> 🔧 Fasten with Flair: Elevate Your Projects with Confidence!

## Quick Answers

- **What is this?** National Hardware N222-174 2190BC U Bolt in Zinc plated,#536-5/16"x2"x4-1/2" by national hardware
- **How much does it cost?** 1786 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/148288744-national-hardware-n222-174-2190bc-u-bolt-in-zinc-plated)

## Best For

- national hardware enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from durable steel wire for both interior and exterior applications.
- • **Versatile Use:** Perfect for a variety of fastening needs, from DIY to professional projects.
- • **Easy Installation:** Includes plate and nuts for a hassle-free setup.
- • **Corrosion Resistant:** Zinc plating ensures longevity and resistance to the elements.
- • **Secure Your Projects:** Fastens products to pipe, wood, and more with confidence.

## Overview

The National Hardware N222-174 U Bolt is a robust fastening solution, measuring 5/16" in diameter and 4-1/2" in length. Made from durable steel wire and zinc plated for corrosion resistance, it comes with a plate and nuts for easy installation, making it ideal for both interior and exterior applications.

## Description

Product Description        Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing latching and fastening options for all of your indoor and outdoor uses. Barrel, Dutch door, flush, mortise and surface bolts designed with ease of use and security in mind. Zinc plating offers corrosion resistance for all of your functional hardware needs.          From the Manufacturer        Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing latching and fastening options for all of your indoor and outdoor uses. Barrel, Dutch door, flush, mortise and surface bolts designed with ease of use and security in mind. Zinc plating offers corrosion resistance for all of your functional hardware needs.

## Features

- National Hardware's 5/16"x2"x 4-1/2" U Bolt is designed for fastening products to pipe, wood, etc.
- Manufactured from steel wire for durability.
- Plate and nuts included for easy installation.
- For interior and exterior applications.

## Images

![National Hardware N222-174 2190BC U Bolt in Zinc plated,#536-5/16"x2"x4-1/2" - Image 1](https://m.media-amazon.com/images/I/61yGqEinV6L.jpg)
![National Hardware N222-174 2190BC U Bolt in Zinc plated,#536-5/16"x2"x4-1/2" - Image 2](https://m.media-amazon.com/images/I/91Oh5L19yHL.jpg)
![National Hardware N222-174 2190BC U Bolt in Zinc plated,#536-5/16"x2"x4-1/2" - Image 3](https://m.media-amazon.com/images/I/51U7uqb+y0L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: which measurement is ID & which is leg length!!F????**
A: 2 1/2" is ID (inside of leg to inside of leg) & 3 1/2" from very top of arch to end of thread (linear measurement). Tip: because of optical illusion, sometimes you can place a piece of paper on monitor and mark vertical and horizontal points, the larger distance is the larger measurement.  ;  )

**Q: Would part 526 be 2” center on center?**
A: No, 2" is the outside dimension of the U-bolt.  You would think the inside dimension was more important!

**Q: which do I use for a 2 inch pole?**
A: It's 2 inches between the threads.  It's not on center of thread. 

So 2.25 in will fit two inch holes on center

**Q: description doesn't specify the inner diameter/center. which u bolt will fit around an 8inch fence post?**
A: I bought the 4 1/2 in and my caliper shows it at 4 35/64, so just over 4.5in. If the diameter of your fence post is 8'', then order an 8'' ubolt and it should fit. What do you have behind that fence, a T-Rex?

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Missing a nut
  

*by T***R on Reviewed in the United States on September 28, 2022*

Defeats the purpose of buying online if I have to go to the hardware store to buy the missing part!

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Exactly as advertised
  

*by A***R on Reviewed in the United States on May 10, 2023*

Exactly as advertised.

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    3 different deliveries for 4 items. Missing bolts
  

*by T***. on Reviewed in the United States on December 10, 2022*

Took awhile. 3 different deliveries for 4 items in a dpan of over a week.Missing the nuts on 3 of the items

---

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**Shop now:** [https://www.desertcart.is/products/148288744-national-hardware-n222-174-2190bc-u-bolt-in-zinc-plated](https://www.desertcart.is/products/148288744-national-hardware-n222-174-2190bc-u-bolt-in-zinc-plated)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-25*