---
product_id: 25466068
title: "National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16\"x1-3/8\"x3-3/4\""
brand: "national hardware"
price: "A$12"
currency: AUD
in_stock: true
reviews_count: 8
category: "National Hardware"
url: https://www.desertcart.com.au/products/25466068-national-hardware-n222-133-2190-u-bolts-in-zinc-516
store_origin: AU
region: Australia
---

# 5/16" diameter precision fit Grade 2 medium-duty alloy steel Zinc plating for corrosion resistance National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4"

**Brand:** national hardware
**Price:** A$12
**Availability:** ✅ In Stock

## Summary

> 🔧 Secure your projects with strength and style!

## Quick Answers

- **What is this?** National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4" by national hardware
- **How much does it cost?** A$12 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/25466068-national-hardware-n222-133-2190-u-bolts-in-zinc-516)

## 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:** Zinc plating provides superior corrosion resistance for indoor and outdoor durability.
- • **Trusted Legacy:** From National Hardware, a century of innovation and quality you can rely on.
- • **Complete Mounting Kit:** Includes plate and nuts for hassle-free installation and maximum stability.
- • **Versatile Application:** Ideal for automotive, plumbing, wood, and pipe fastening needs across industries.
- • **Precision Engineered Fit:** 5/16" diameter and 3/4"-10 thread size ensure secure fastening every time.

## Overview

The National Hardware N222-133 U Bolts are medium-duty, zinc-plated alloy steel fasteners designed for versatile use in automotive, plumbing, wood, and pipe applications. Featuring a 5/16" diameter and 3/4"-10 right-hand thread, these U bolts come with plates and nuts for easy installation and enhanced stability. Their corrosion-resistant zinc finish ensures long-lasting performance indoors and outdoors, backed by National Hardware’s century-long commitment to quality and innovation.

## 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.

Review: Saved my life - Used as restricting ring on my oversize member. Worked great!
Review: Great value - was just as advertised and shipped very quickly

## Features

- Designed for fastening products to pipe, wood, etc.
- Suitable for automotive, plumbing and other home and industrial applications
- Plate and nuts included
- Manufactured from steel wire
- Designed for fastening products to pipe, wood, etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BQMZJ2 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #484,376 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #360 in U-Bolts |
| Brand | National Hardware |
| Color | Zinc Plated |
| Customer Reviews | 4.1 4.1 out of 5 stars (42) |
| Cutting Diameter | 7.94 Millimeters |
| Date First Available | February 17, 2007 |
| Exterior Finish | Zinc |
| Fastener Type | U-Bolt |
| Finish | Zinc plated |
| Global Trade Identification Number | 00038613125902 |
| Head Style | phillips |
| Head Type | Hex |
| Is Discontinued By Manufacturer | No |
| Item Diameter | 7.94 Millimeters |
| Item Hardness | Grade 2 |
| Item Package Quantity | 1 |
| Item Weight | 0.01 ounces |
| Item model number | N222-133 |
| Manufacturer | National Hardware |
| Manufacturer Grade | medium-duty |
| Material | Alloy Steel |
| Measurement System | Inch |
| Metal Type | Zinc |
| Mounting Type | Plate Mount |
| Number of Pieces | 5 |
| Part Number | N222-133 |
| Set Name | Pack of 5 |
| Shape | U-Shape |
| Size | 5/16 |
| Thread Class | 3A |
| Thread Size | 3/4"-10 |
| Thread Style | Right Hand |
| Thread Type | Metric |
| Tool Tip Description | Flat |
| UPC | 038613125902 |
| Usage | Wood |
| Warranty Description | Warranty |

## Product Details

- **Exterior Finish:** Zinc
- **Head Style:** phillips
- **Manufacturer Grade:** medium-duty
- **Material:** Alloy Steel
- **Thread Size:** 3/4"-10

## Images

![National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4" - Image 1](https://m.media-amazon.com/images/I/51U7uqb+y0L.jpg)
![National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4" - Image 2](https://m.media-amazon.com/images/I/51spgmhBxCL.jpg)
![National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4" - Image 3](https://m.media-amazon.com/images/I/61+ZiJAdsDL.jpg)
![National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4" - Image 4](https://m.media-amazon.com/images/I/61kgO9prO9L.jpg)
![National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4" - Image 5](https://m.media-amazon.com/images/I/91Oh5L19yHL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Saved my life
*by J***H on August 14, 2023*

Used as restricting ring on my oversize member. Worked great!

### ⭐⭐⭐⭐⭐ Great value
*by R***L on December 10, 2025*

was just as advertised and shipped very quickly

### ⭐⭐⭐⭐⭐ works well
*by A***R on August 24, 2022*

Worked well for what I needed and it was a good price.

## Frequently Bought Together

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---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-19*