---
product_id: 626781569
title: "5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs"
brand: "roycemart"
price: "₩23588"
currency: KRW
in_stock: true
reviews_count: 7
url: https://www.desertcart.kr/products/626781569-5-16-18-x-3-4-serrated-flange-hex-head
store_origin: KR
region: South Korea
---

# 5/16-18 size 12 pcs included 304 stainless steel 5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs

**Brand:** roycemart
**Price:** ₩23588
**Availability:** ✅ In Stock

## Summary

> 🔩 Secure Your Projects with Style!

## Quick Answers

- **What is this?** 5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs by roycemart
- **How much does it cost?** ₩23588 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/626781569-5-16-18-x-3-4-serrated-flange-hex-head)

## Best For

- roycemart enthusiasts

## Why This Product

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

## Key Features

- • **🔧 Versatile Use:** Ideal for various applications, from home projects to professional settings, ensuring you’re always prepared.
- • **⚡ Vibration Resistance:** Serrated flange design grips surfaces tightly, minimizing loosening from vibrations.
- • **🔒 Unmatched Durability:** Crafted from high-quality 304 stainless steel, these bolts resist corrosion and ensure longevity.
- • **💪 Pressure Distribution:** Flange eliminates the need for washers, distributing pressure evenly for a secure fit.
- • **📏 Precision Engineering:** Fully threaded with a coarse UNC thread for easy installation and reliable performance.

## Overview

This set of 12 serrated flange hex head bolts is designed for strength and reliability. Made from 304 stainless steel, these fully threaded bolts measure 5/16-18 x 3/4 inches, featuring a unique serrated flange that enhances grip and pressure distribution, making them perfect for a variety of applications.

## Description

5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs

## Features

- Screw Size: 5/16-18 x 3/4 inch Thread Length: 0.75 inch ; Thread Size: 5/16-18
- Head Height: 17.27mm (max); Head Height: 8.12mm (max)
- Please note that, the head height includes the flange while the length is measured from under the head.
- The serrations under the head help grip the surface for mild vibration resistance. The flange help distribute the pressure where the screw meet the surface, eliminating the need for a separate washer.
- Material: High Quality 304 Stainless Steel 18-8, great strength and good corrosion resistance to make fasteners last!

## Images

![5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs - Image 1](https://m.media-amazon.com/images/I/61FlqKxN6IL.jpg)
![5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs - Image 2](https://m.media-amazon.com/images/I/71mR-zB6rfL.jpg)
![5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs - Image 3](https://m.media-amazon.com/images/I/71mR-zB6rfL.jpg)
![5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs - Image 4](https://m.media-amazon.com/images/I/61JjJY0x7ZL.jpg)
![5/16-18 x 3/4 Serrated Flange Hex Head Bolts Screws, 304 Stainless Steel 18-8, Fully Threaded, Coarse Thread UNC, 12 pcs - Image 5](https://m.media-amazon.com/images/I/71NqpkB61wL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Good quality and very secure
  

*by C***S on Reviewed in the United States on June 18, 2024*

Use these on oil pans and timing gear covers and they work great. No rusting and self locking so fewer leaks form stuff coming loose.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Nice Bolts
  

*by E***D on Reviewed in the United States on May 7, 2024*

Worked fine. Seem like they are good quality.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Bolts I needed quickly
  

*by R***. on Reviewed in the United States on May 5, 2024*

Great quality and delivered quickly

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**Shop now:** [https://www.desertcart.kr/products/626781569-5-16-18-x-3-4-serrated-flange-hex-head](https://www.desertcart.kr/products/626781569-5-16-18-x-3-4-serrated-flange-hex-head)

---

*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-17*