---
product_id: 20018007
title: "Hillman 240180 Carriage Bolt, 3/8 x 4-Inch, Steel, Zinc-Plated, Silver, 50-Pack"
brand: "hillman"
price: "$163.93"
currency: USD
in_stock: true
reviews_count: 9
category: "Hillman"
url: https://www.desertcart.us/products/20018007-hillman-240180-carriage-bolt-3-8-x-4-inch-steel
store_origin: US
region: United States of America
---

# Zinc-plated corrosion resistance 3/8-inch diameter precision fit Self-locking square neck, no washer needed Hillman 240180 Carriage Bolt, 3/8 x 4-Inch, Steel, Zinc-Plated, Silver, 50-Pack

**Brand:** hillman
**Price:** $163.93
**Availability:** ✅ In Stock

## Summary

> 🔩 Secure your projects with style and strength—because quality bolts mean no compromises!

## Quick Answers

- **What is this?** Hillman 240180 Carriage Bolt, 3/8 x 4-Inch, Steel, Zinc-Plated, Silver, 50-Pack by hillman
- **How much does it cost?** $163.93 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/20018007-hillman-240180-carriage-bolt-3-8-x-4-inch-steel)

## Best For

- hillman enthusiasts

## Why This Product

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

## Key Features

- • **Lock & load:** Square underside locks bolt in place, eliminating spinning and extra tools.
- • **Durable shine:** Zinc plating offers rust resistance with a consistent, professional look.
- • **Bulk value pack:** 50 high-quality bolts at a price that beats local stores—never run out mid-project.
- • **Versatile strength:** Grade 2 alloy steel built to secure wood-to-wood or wood-to-metal connections flawlessly.
- • **Effortless fastening:** Flat head design ensures a sleek, semi-flush finish without extra washers.

## Overview

The Hillman 240180 Carriage Bolt is a 3/8 x 4-inch zinc-plated steel fastener designed for wood-to-wood or wood-to-metal applications. Featuring a flat head for a semi-flush finish and a self-locking square neck that eliminates the need for washers or extra tools, this 50-pack offers durable, rust-resistant performance with a sleek, consistent finish—perfect for professionals and DIYers who demand reliability and value.

## Description

Product Description Carriage Bolts are designed to fasten a wooden face to either a wood or metal frame. Its flat head is designed to eliminate the need for a washer and provide a semi-flush finish to applications. The square underside of the head is self locking to eliminate spinning and the need for a driving tool. The zinc plating is rust resistant and provides a beautiful, consistent finish; but, may not work for all exterior projects. From the Manufacturer Carriage Bolts have a smooth, rounded head that has a small square section underneath. They are used in wood connections utilizing the square neck under the round head which will sit into the hole to prevent the head from turning. These carriage bolts come plated in zinc for moderate corrosion resistance.

Review: Great value - I needed this size bolts for a project so I went to my local box store and was surprised how expensive this were,I could get about 8 bolts for the same price that I got this box of 50,I really didn't need that many but I couldn't pass this offer,they are the same quality than the more expensive ones,my only complaint is that the box was smashed inside the delivery package ,but for the looks of it it happened during transport because I counted the pieces and they were all there.
Review: Fantastic Price compared to local **** store. Same Quality. - Great bolts! I have used a half dozen or so for projects and found no flaws in any of them. I am using them with t-nuts which I think are a little more prone to cross threading than regular nut and so far every one of them has threaded without any problems. I bought a box of them so probably won't be buying any more for while but when I do and/or if I need a different size I will certainly look to desertcart and the Hillman Group to make that purchase.

## Features

- Carriage Bolts are designed to fasten a wooden face to either wood or metal
- Flat head provides a semi-flush finish to applications
- The heads is designed to eliminate the need for a washer
- Square underside of the head is self locking to eliminate the need for a driving tool
- Zinc Finish provides a beautiful, consistent finish

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BD6E60 |
| Best Sellers Rank | #373,023 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #367 in Carriage Bolts |
| Brand | Hillman |
| Color | No Color |
| Compatible Groove Diameter | 0.38 inches |
| Customer Reviews | 4.6 out of 5 stars 43 Reviews |
| Exterior Finish | Zinc |
| Fastener Size | 3/8"-16 x |
| Fastener Type | Carriage Bolt |
| Finish Types | Glossy |
| Global Trade Identification Number | 00008236087024 |
| Grade Rating | Grade 8 |
| Head Style | Flat |
| Head Type | Flat |
| Included Components | Hardware; Fasteners & Hooks;carriage-screws-and-bolts |
| Item Diameter | 0.38 inches |
| Item Dimensions | 3.3 x 4.3 x 5.4 inches |
| Item Hardness | Grade 2 |
| Item Type Name | 3/8-16X4 CARRIAGE BOLT |
| Item Weight | 6 pounds |
| Manufacturer | The Hillman Group |
| Manufacturer Grade | Grade 2 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Metal Type | Alloy Steel |
| Model | 240180 |
| Number Of Items | 1 |
| Number of Pieces | 50 |
| Outside Diameter | 0.38 inches |
| Part Number | 240180 |
| Screw Head Style | Flat |
| Screw Point Style | Flat Point |
| Set Name | 50-Pack |
| Size Name | 3/8 x 4-Inch |
| Thread Class | UNC |
| Thread Coverage | Partially Threaded |
| Thread Size | 4" |
| Thread Style | Right Hand |
| Thread Type | Unc |
| UPC | 008236087024 |
| Unit Count | 1 Count |
| Warranty Description | Warranty |

## Images

![Hillman 240180 Carriage Bolt, 3/8 x 4-Inch, Steel, Zinc-Plated, Silver, 50-Pack - Image 1](https://m.media-amazon.com/images/I/71wY9SW7Z0L.jpg)
![Hillman 240180 Carriage Bolt, 3/8 x 4-Inch, Steel, Zinc-Plated, Silver, 50-Pack - Image 2](https://m.media-amazon.com/images/I/71oh4cDE9EL.jpg)
![Hillman 240180 Carriage Bolt, 3/8 x 4-Inch, Steel, Zinc-Plated, Silver, 50-Pack - Image 3](https://m.media-amazon.com/images/I/71yYEtwl6ML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value
*by A***R on August 18, 2024*

I needed this size bolts for a project so I went to my local box store and was surprised how expensive this were,I could get about 8 bolts for the same price that I got this box of 50,I really didn't need that many but I couldn't pass this offer,they are the same quality than the more expensive ones,my only complaint is that the box was smashed inside the delivery package ,but for the looks of it it happened during transport because I counted the pieces and they were all there.

### ⭐⭐⭐⭐⭐ Fantastic Price compared to local **** store. Same Quality.
*by S***D on January 7, 2016*

Great bolts! I have used a half dozen or so for projects and found no flaws in any of them. I am using them with t-nuts which I think are a little more prone to cross threading than regular nut and so far every one of them has threaded without any problems. I bought a box of them so probably won't be buying any more for while but when I do and/or if I need a different size I will certainly look to Amazon and the Hillman Group to make that purchase.

### ⭐⭐⭐⭐⭐ Great value!
*by J***Y on June 30, 2023*

We use a lot of these and it’s much more economical to purchase these in bulk. Great value for the money.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-05*