---
product_id: 499485788
title: "3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner"
brand: "glvaner"
price: "R497"
currency: ZAR
in_stock: true
category: "Glvaner"
url: https://www.desertcart.co.za/products/499485788-3-8-16-x-4-inch-carriage-bolt-kit-304
store_origin: ZA
region: South Africa
---

# 6-piece complete kit Full thread & square neck design Grade A2-70 304 stainless steel 3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner

**Brand:** glvaner
**Price:** R497
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your build with bolts that mean business—strength, precision, and zero hassle!

## Quick Answers

- **What is this?** 3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner by glvaner
- **How much does it cost?** R497 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/499485788-3-8-16-x-4-inch-carriage-bolt-kit-304)

## Best For

- glvaner enthusiasts

## Why This Product

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

## Key Features

- • **Flawless Fit Every Time:** ANSI B18.5 precision machining ensures smooth installation and zero cross-threading.
- • **Vibration-Proof Locking:** Square neck bites into wood to prevent spinning, securing your build permanently.
- • **All-in-One Precision Kit:** 6 perfectly matched bolts, nuts & washers ready to power your project start to finish.
- • **Premium Corrosion Resistance:** Crafted from Grade A2-70 304 stainless steel for unmatched durability indoors and out.
- • **Versatile Heavy-Duty Strength:** Ideal for decks, trailers, fences, and more—engineered to hold tight where it counts.

## Overview

This 6-set carriage bolt kit by Glvaner features 3/8-16 x 4 inch bolts made from premium Grade A2-70 304 stainless steel, delivering superior corrosion resistance and strength. Each bolt is fully threaded with a locking square neck for secure, vibration-resistant fastening. Precision machined to ANSI B18.5 standards, the kit includes matching hex nuts and flat washers, making it a complete, ready-to-use solution for demanding indoor and outdoor projects.

## Description

3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner: desertcart.com: Industrial & Scientific

## Features

- Ready to Use – Save Time & Effort: This complete 6-piece set includes 6 precisely matched 3/8-16 x 4" Carriage Bolts, 6 Hex Nuts, and 6 Flat Washers; No more separate purchases or surprise missing parts—get everything you need to start and finish your project efficiently
- Engineered from Grade A2-70 304 (18-8) Stainless Steel, these fasteners deliver significantly greater corrosion resistance and strength compared to zinc-plated or lower-grade alternatives. Designed to perform reliably in both indoor and demanding outdoor environments
- Precision Machining – For a Smooth, Flawless Fit: Every bolt is manufactured to meet ANSI B18.5 standards, ensuring consistent quality, precise threads, and accurate dimensions. This ensures smooth installation, prevents cross-threading, and delivers a secure, reliable fit in every application
- Full Thread Design & Locking Square Neck – Unmatched Strength & Easy Installation: Featuring Full Thread Coverage from neck to tip for maximum nut engagement and superior strength. Moreover, the integrated square neck is designed to bite securely into wood, preventing the bolt from spinning during nut tightening—saving you time and frustration. This robust combination ensures a vibration-resistant and permanently secure connection
- Versatile, Heavy-Duty Fastening Solution: Perfect for a wide range of critical applications. From securing deck boards to joists and reinforcing trailer beds and ramps, to building fences, pergolas, and outdoor furniture. Also ideal for agricultural equipment repair, workshop jigs, playground structures, and securing ledger boards to framing. Designed to provide a secure, permanent connection where strength and reliability matter most

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09D92FFHK |
| Best Sellers Rank | #4,498 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Carriage Bolts |
| Brand | Glvaner |
| Color | Silver |
| Customer Reviews | 4.7 4.7 out of 5 stars (753) |
| Drive System | External Hex |
| Exterior Finish | Stainless Steel |
| Fastener Size | 3/8-16 x 4" |
| Fastener Type | Carriage Bolt |
| Finish Types | Brushed |
| Grade Rating | Grade A2-70 |
| Head Type | Round |
| Item Diameter | 0.38 Inches |
| Item Hardness | Rockwell B70 |
| Manufacturer | Glvaner |
| Manufacturer Grade | Grade 304 |
| Material Type | Stainless Steel |
| Metal Type | Stainless Steel |
| Model | GVNA36057-6 |
| Number Of Items | 6 |
| Number of Pieces | 6 |
| Part Number | GVNA36057-6 |
| Screw Head Style | Round |
| Set Name | 3/8-16 x 4 Inch Carriage Bolt Kit |
| Size Name | 3/8-16 x 4" |
| Thread Class | 2A |
| Thread Coverage | Fully Threaded |
| Thread Size | 3/8"-16 |
| Thread Style | Right Hand |
| Thread Type | Thread Type: Coarse |
| UPC | 793869888604 |
| Unit Count | 6.0 Count |

## Product Details

- **Exterior Finish:** Stainless Steel
- **Head Style:** Round
- **Manufacturer Grade:** Grade 304
- **Material:** Stainless Steel
- **Thread Size:** 3/8"-16

## Images

![3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner - Image 1](https://m.media-amazon.com/images/I/6152oo1b9ZL.jpg)
![3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner - Image 2](https://m.media-amazon.com/images/I/71iVL-auBKL.jpg)
![3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner - Image 3](https://m.media-amazon.com/images/I/71kitRflmTL.jpg)
![3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner - Image 4](https://m.media-amazon.com/images/I/81iSDeGJq1L.jpg)
![3/8-16 x 4 Inch Carriage Bolt Kit, 304 Stainless Steel (18-8) with Hex Nuts & Flat Washers - 6 Sets, Round Head Square Neck, Full Thread Coverage by Glvaner - Image 5](https://m.media-amazon.com/images/I/61EJiOLG6HL.jpg)

## Available Options

This product comes in different **Size, Number Of Items** options.

## Questions & Answers

**Q: Are these real 304 stainless steel?**
A: Yes. These are made of high-quality 304 (18-8) stainless steel, tested to resist rust and corrosion in outdoor and damp environments

**Q: Does each set include nut and washer?**
A: Yes. Every set comes with a matched hex nut and flat washer, no additional parts needed

**Q: Can these be used on wood?**
A: Yes. The round head distributes pressure and protects wood, ideal for decks, fences, and furniture.

**Q: What is the square neck for?**
A: The square neck prevents the bolt from spinning when tightening the nut, making installation fast and easy.

**Q: What tools do I need for installation?**
A: Just a wrench or socket to tighten the hex nut. No special tools required.

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**Shop now:** [https://www.desertcart.co.za/products/499485788-3-8-16-x-4-inch-carriage-bolt-kit-304](https://www.desertcart.co.za/products/499485788-3-8-16-x-4-inch-carriage-bolt-kit-304)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-07-04*