---
product_id: 26792184
title: "National Hardware N221-689 2162BC Hook Bolt Zinc plated, 5/16\" x 5\""
brand: "national hardware"
price: "$7.22"
currency: USD
in_stock: true
reviews_count: 8
category: "National Hardware"
url: https://www.desertcart.us/products/26792184-national-hardware-n221-689-2162bc-hook-bolt-zinc-plated-5
store_origin: US
region: United States of America
---

# Includes 2 hex nuts for secure fastening 5/16" x 5" heavy-duty size Zinc plating for corrosion resistance National Hardware N221-689 2162BC Hook Bolt Zinc plated, 5/16" x 5"

**Brand:** national hardware
**Price:** $7.22
**Availability:** ✅ In Stock

## Summary

> 🔩 Secure your space with industrial strength and corrosion-proof confidence!

## Quick Answers

- **What is this?** National Hardware N221-689 2162BC Hook Bolt Zinc plated, 5/16" x 5" by national hardware
- **How much does it cost?** $7.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/26792184-national-hardware-n221-689-2162bc-hook-bolt-zinc-plated-5)

## 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:** Grade 5 steel wire ensures industrial-grade strength and durability.
- • **Precision Fit:** Standard machine screw threads with 3B thread class for smooth, reliable fastening.
- • **Adjustable & Secure:** Includes 2 hex nuts and external hex drive for easy installation and tension adjustment.
- • **Versatile Application:** Ideal for home, farm, builder, and industrial projects needing strong hook bolts.
- • **Corrosion-Resistant Finish:** Zinc plating protects against rust, perfect for indoor and outdoor use.

## Overview

The National Hardware N221-689 2162BC Hook Bolt is a 5/16" x 5" zinc-plated, Grade 5 steel hook bolt designed for both interior and exterior applications. Featuring standard machine screw threads and including two hex nuts, it offers reliable fastening and corrosion resistance, making it ideal for demanding home, farm, and industrial uses.

## 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. Hook bolts are an ideal solution to situations where self-tapping hooks are not a feasible option. 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. Hook bolts are an ideal solution to situations where self-tapping hooks are not a feasible option. Zinc plating offers corrosion resistance for all of your functional hardware needs.

Review: Works great - Used to support 185 lbs garage door spring tension. Works great.
Review: This hook bolt is perfect for mounting and adjusting a garage door spring. - This hook bolt is long enough to provide plenty of adjustability and strong enough to hold spring tension.

## Features

- Designed for home and industrial applications
- 2 Hex nuts included
- Standard machine screw threads
- For interior and exterior applications
- Manufactured from steel wire

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BOKOWO |
| Best Sellers Rank | #101,305 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #294 in Screw-In Hooks |
| Brand | National Hardware |
| Color | Zinc plated |
| Compatible Groove Diameter | 0.63 Inches |
| Customer Reviews | 4.7 out of 5 stars 51 Reviews |
| Drive System | External Hex |
| Exterior Finish | Zinc |
| Fastener Size | 5/16" x 5" |
| Fastener Type | Hexagon Bolt |
| Finish Types | Zinc plated |
| Global Trade Identification Number | 00038613124127 |
| Grade Rating | Grade 5 |
| Head Style | Hex |
| Head Type | Hexagonal |
| Included Components | National Hardware N221-689 2162 Hook Bolts in Zinc, 5/16" x 5" |
| Item Diameter | 0.63 Inches |
| Item Dimensions | 6.5 x 2.5 x 2.2 inches |
| Item Hardness | Grade 5 |
| Item Type Name | Stanley National Hardware N221-689 2162BC Hook Bolt Zinc plated, 5/16" x 5" |
| Item Weight | 0.01 Ounces |
| Manufacturer | National Hardware |
| Manufacturer Grade | Grade 5 |
| Material | Plastic |
| Material Type | Plastic |
| Metal Type | Zinc |
| Model | N221-689 |
| Number Of Items | 1 |
| Number of Pieces | 2 |
| Part Number | N221-689 |
| Screw Head Style | Hex |
| Screw Point Style | Cone Point |
| Size Name | 5/16" x 5" |
| Thread Class | 3B |
| Thread Coverage | Fully Threaded |
| Thread Size | 5/16"-18 |
| Thread Style | Right Hand |
| Thread Type | Unc |
| UPC | 038613124127 |
| Unit Count | 1.0 Count |
| Warranty Description | Warranty |

## Product Details

- **Material:** Plastic
- **Thread Size:** 5/16"-18
- **Exterior Finish:** Zinc
- **Manufacturer Grade:** Grade 5
- **Head Style:** Hex

## Images

![National Hardware N221-689 2162BC Hook Bolt Zinc plated, 5/16" x 5" - Image 1](https://m.media-amazon.com/images/I/51tteNqjFcL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by A***. on April 22, 2026*

Used to support 185 lbs garage door spring tension. Works great.

### ⭐⭐⭐⭐⭐ This hook bolt is perfect for mounting and adjusting a garage door spring.
*by J***5 on August 11, 2020*

This hook bolt is long enough to provide plenty of adjustability and strong enough to hold spring tension.

### ⭐⭐⭐⭐⭐ Very sturdy
*by B***G on March 26, 2019*

Perfect for hanging bird feeders! Sturdy and would buy again if needed.

## Frequently Bought Together

- National Hardware N221-689 2162 Hook Bolts in Zinc, 5/16" x 5"
- National Hardware N221-697 2162 Hook Bolts in Zinc, 3/8" x 7"
- Prime-Line 9069290 Clothesline Hooks With Nuts, 1/4 In.-20 X 4-1/4 In., Zinc Plated Steel (10 Pack)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-24*