---
product_id: 82981765
title: "National Hardware U Bolt, #546-5/16\" x 2-1/2\" x 5\", Steel, Zinc Plated"
brand: "national hardware"
price: "€ 12.23"
currency: EUR
in_stock: true
category: "National Hardware"
url: https://www.desertcart.gr/products/82981765-national-hardware-u-bolt-546-5-16-x-2-1
store_origin: GR
region: Greece
---

# 5/16" diameter precision fit Complete set with plate & nuts Zinc plating for corrosion resistance National Hardware U Bolt, #546-5/16" x 2-1/2" x 5", Steel, Zinc Plated

**Brand:** national hardware
**Price:** € 12.23
**Availability:** ✅ In Stock

## Summary

> 🔧 Secure your projects with strength and style — don’t get left behind!

## Quick Answers

- **What is this?** National Hardware U Bolt, #546-5/16" x 2-1/2" x 5", Steel, Zinc Plated by national hardware
- **How much does it cost?** € 12.23 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/82981765-national-hardware-u-bolt-546-5-16-x-2-1)

## 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:** Heavy-duty steel wire construction ensures industrial-grade durability for all your toughest projects.
- • **Rust? Not Here:** Zinc plating delivers superior corrosion resistance, keeping your fasteners pristine in any weather.
- • **Trusted Legacy:** Backed by National Hardware’s century-long reputation for quality and innovation.
- • **Versatility Unlocked:** Perfect for automotive, plumbing, construction, and more—your go-to fastening solution.
- • **All-in-One Convenience:** Includes matching plate and nuts—no extra hardware runs, just seamless installation every time.

## Overview

The National Hardware U Bolt (#546-5/16" x 2-1/2" x 5") is a professional-grade, zinc-plated steel fastener designed for versatile use in automotive, plumbing, and industrial applications. Featuring a 5/16" diameter and complete with matching plate and nuts, it offers superior corrosion resistance and long-lasting durability, backed by over 100 years of manufacturing excellence.

## 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

- CONSTRUCTION: Heavy-duty steel wire construction with zinc plating provides superior corrosion resistance for u bolts designed to secure pipes, wood, and various materials in demanding automotive and industrial applications.
- SPECIFICATIONS: 5/16 bolt diameter with 2-1/2 in x 5 in dimensions creates versatile fastening solution for automotive, plumbing, and industrial projects requiring reliable u-bolts and nuts set for secure connections.
- COMPLETE SET: Includes matching plate and nuts with every 5/16 bolts purchase, eliminating need for separate hardware purchases and ensuring proper fit for secure installation every time you need dependable u bolt fasteners.
- VERSATILITY: Multi-purpose design works perfectly for interior and exterior applications including automotive repairs, plumbing installations, and general construction projects requiring dependable u bolt fasteners and u-bolts solutions.
- DURABILITY: Professional-grade steel wire manufacturing ensures long-lasting performance in harsh environments while zinc coating protects against rust and weathering for extended service life of these 5/16 bolts in all weather conditions.
- QUALITY: National Hardware brand ensures over a century of manufacturing excellence with color-coded labeling system for easy identification, backed by proven innovation and superior product standards.
- Manufactured from steel wire
- Designed for fastening products to pipe, wood, etc
- Suitable for automotive, plumbing and other home and industrial applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BQUMVU |
| Best Sellers Rank | #83,800 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #65 in U-Bolts #1,027 in Door Latches & Bolts |
| Brand | National Hardware |
| Color | Zinc plated |
| Compatible Groove Diameter | 0.31 inches |
| Customer Reviews | 4.5 4.5 out of 5 stars (285) |
| Exterior Finish | Zinc |
| Fastener Size | 5/16" x 2-1/2" x 5" |
| Finish Types | Zinc plated |
| Global Trade Identification Number | 00038613126169 |
| Grade Rating | Grade 2 |
| Head Type | U-shaped |
| Included Components | National Hardware N222-562 DP2190BC U Bolt Zinc plated, 5/16" x 2-1/2" x 5" |
| Item Diameter | 0.31 inches |
| Item Dimensions | 12.3 x 4.3 x 5.9 inches |
| Item Hardness | Grade 2 |
| Item Highlight | Clamps Around 2-1/2 in Pipe or Posts; Plate and Nuts Included, WeatherGuard Coating Resists Rust |
| Item Type Name | Stanley National Hardware N222-562 DP2190BC U Bolt Zinc plated, 5/16" x 2-1/2" x 5" |
| Item Weight | 0.27 g |
| Manufacturer | National Hardware |
| Manufacturer Grade | Grade Z1 |
| Material Type | Stainless Steel |
| Metal Type | zinc-coated steel |
| Model | N222-562 |
| Number Of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Outside Diameter | 0.31 inches |
| Part Number | N222-315 |
| Screw Head Style | U-Bolt |
| Screw Point Style | U-Bolt |
| Set Name | National Hardware N222-562 DP2190BC U Bolt Set (1 U Bolt, 1 Plate, 2 Nuts) |
| Set Screw Thread Type | Unc Or Unf |
| Size Name | 1 Count (Pack of 1) |
| Thread Coverage | Threaded on Both End |
| Thread Size | 5/16 Inch-18 |
| Thread Style | Right Hand |
| Thread Type | Unc Or Unf |
| UPC | 038613126169 |
| Unit Count | 1 Count |
| Warranty Description | Warranty |

## Product Details

- **Exterior Finish:** Zinc
- **Head Style:** U-Bolt
- **Manufacturer Grade:** Grade Z1
- **Material:** Stainless Steel
- **Thread Size:** 5/16 Inch-18

## Images

![National Hardware U Bolt, #546-5/16" x 2-1/2" x 5", Steel, Zinc Plated - Image 1](https://m.media-amazon.com/images/I/61LWuj+fOhL.jpg)
![National Hardware U Bolt, #546-5/16" x 2-1/2" x 5", Steel, Zinc Plated - Image 2](https://m.media-amazon.com/images/I/41NCeWbkyIL.jpg)
![National Hardware U Bolt, #546-5/16" x 2-1/2" x 5", Steel, Zinc Plated - Image 3](https://m.media-amazon.com/images/I/61kgO9prO9L.jpg)
![National Hardware U Bolt, #546-5/16" x 2-1/2" x 5", Steel, Zinc Plated - Image 4](https://m.media-amazon.com/images/I/51U7uqb+y0L.jpg)
![National Hardware U Bolt, #546-5/16" x 2-1/2" x 5", Steel, Zinc Plated - Image 5](https://m.media-amazon.com/images/I/315ZizrsJkL.jpg)

## Available Options

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

## Frequently Bought Together

- National Hardware N222-562 DP2190BC U Bolt Zinc plated, 5/16" x 2-1/2" x 5"
- National Hardware N222-217 U Bolt, 652, 652-3/8"x3 x4-1/2, Zinc Plated
- National Hardware N222-190 2190BC U Bolt in Zinc plated,#632-3/8"x2"x3-1/2"

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-06*