---
product_id: 722063436
title: "5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack"
brand: "horiznext"
price: "$25.61"
currency: USD
in_stock: true
reviews_count: 9
category: "Horiznext"
url: https://www.desertcart.us/products/722063436-5-16-inch-od-compression-fittings-304-stainless-steel-2
store_origin: US
region: United States of America
---

# 1000 PSI Max Pressure 304 Stainless Steel Durability -100 to +660°F Temp Range 5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack

**Brand:** horiznext
**Price:** $25.61
**Availability:** ✅ In Stock

## Summary

> 🔧 Connect with Confidence — The Ultimate Compression Fitting for Pros Who Demand More

## Quick Answers

- **What is this?** 5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack by horiznext
- **How much does it cost?** $25.61 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/722063436-5-16-inch-od-compression-fittings-304-stainless-steel-2)

## Best For

- horiznext enthusiasts

## Why This Product

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

## Key Features

- • **Thermal Resilience:** Operates flawlessly from freezing -100°F to scorching +660°F environments.
- • **Pressure-Ready Performance:** Handles up to 1000 PSI, perfect for demanding industrial and automotive applications.
- • **Precision Fit for 5/16" Tubing:** Engineered to securely connect and extend 5/16 inch OD metal tubes with a leak-proof seal.
- • **Unmatched Strength & Longevity:** Crafted from premium 304 stainless steel for corrosion resistance and heavy-duty use.
- • **Reusable & Reliable Union Design:** Easily assemble or disassemble without compromising the integrity of your tubing system.

## Overview

The Horiznext 5/16 Inch OD Compression Fittings are a 2-pack of heavy-duty, 304 stainless steel union connectors designed for 5/16 inch outer diameter metal tubing. Rated for up to 1000 PSI and a wide temperature range (-100°F to +660°F), these fittings ensure leak-proof, durable connections ideal for air lines, fuel systems, brake hoses, and more. Their reusable design allows for easy assembly and disassembly, making them a trusted choice for professional-grade plumbing and industrial applications.

## Description

Buy Horiznext 5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack | Straight union connect air line brass pipe, adapt copper brake hose water fuel system: Pipe Fittings - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: BAD REVIEWS ARE FROM PEOPLE THAT DON'T UNDERSTAND WHAT THIS FITTING IS FOR - Please disregard the negative reviews regarding this item not fitting or threads being wrong. Those reviews were left by people that do not understand what this fitting is for. This is a union fitting to allow you to connect to a 5/16 outer diameter (0.3125" or 8mm) metal tube. You slide the nut onto the tube. Then you slide the smaller ferrule onto the tube. Then you slide the bigger, cone-shaped ferrule onto the tube. Then you push the tube into the fitting. Then you slide the nut down the tube and begin tightening it onto the fitting. The tightening process will wedge the ferrules together - and crimp them like crazy onto the tube. You can then assemble or disassemble the joint as often as you like. Be aware the ferrules will be permanently crimped onto the tube - and the nut won't be able to be removed from the tube. Do not use on plastic or teflon tubing. This is for steel/stainless/aluminum tubing only. I suppose it would probably work on copper, but these fittings rely on your tubing being nice and round - and stiff enough to take the crimping process. They work great and can handle tens of thousands of psi of pressure.
Review: Good quality - Had to customize 5/16 fuel line and this compression fitting allowed it to work. No leaks

## Features

- Made of stainless steel 304, heavy duty and durable.
- Used to connect 5/16" outer diameter tube
- Fittings for connecting and extending stainless steel, copper, rigid and semi-rigid tubing
- The working pressure can reach 1000 psi
- Temperature range from -100 to +660 degrees ℉

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DRN791Y9 |
| Best Sellers Rank | #86,259 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3,478 in Pipe Fittings |
| Brand | Horiznext |
| Brand Name | Horiznext |
| Color | Stainless Steel |
| Connector Type | Union |
| Customer Reviews | 4.5 out of 5 stars 263 Reviews |
| Exterior Finish | Stainless Steel |
| Included Components | fittings |
| Item Dimensions | 1.8 x 1.4 x 0.6 inches |
| Item Highlight | Straight union connect air line brass pipe, adapt copper brake hose water fuel system |
| Item Weight | 0.1 kg |
| Item dimensions L x W x H | 1.8 x 1.4 x 0.6 inches |
| Manufacturer | Horiznext |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Number of Packs | 2 |
| Number of Pieces | 2 |
| Set Name | 2 |
| Size | 5/16 inch 2pcs |
| Thread Size | 1.9 inch |
| Unit Count | 2 Count |

## Product Details

- **Size:** 5/16 inch 2pcs
- **Material:** Stainless Steel
- **Brand:** Horiznext
- **Color:** Stainless Steel
- **Item dimensions L x W x H:** 1.8 x 1.4 x 0.6 inches
- **Exterior Finish:** Stainless Steel
- **Manufacturer:** Horiznext

## Images

![5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack - Image 1](https://m.media-amazon.com/images/I/416yU1-Dg5L.jpg)
![5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack - Image 2](https://m.media-amazon.com/images/I/51YsvhpX-6L.jpg)
![5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack - Image 3](https://m.media-amazon.com/images/I/51KJpnVs9aL.jpg)
![5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack - Image 4](https://m.media-amazon.com/images/I/61QFZ3aDO9L.jpg)
![5/16 Inch OD Compression Fittings, 304 Stainless Steel, 2 Pack - Image 5](https://m.media-amazon.com/images/I/61s4WkbNN1L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ BAD REVIEWS ARE FROM PEOPLE THAT DON'T UNDERSTAND WHAT THIS FITTING IS FOR
*by T***4 on April 15, 2022*

Please disregard the negative reviews regarding this item not fitting or threads being wrong. Those reviews were left by people that do not understand what this fitting is for. This is a union fitting to allow you to connect to a 5/16 outer diameter (0.3125" or 8mm) metal tube. You slide the nut onto the tube. Then you slide the smaller ferrule onto the tube. Then you slide the bigger, cone-shaped ferrule onto the tube. Then you push the tube into the fitting. Then you slide the nut down the tube and begin tightening it onto the fitting. The tightening process will wedge the ferrules together - and crimp them like crazy onto the tube. You can then assemble or disassemble the joint as often as you like. Be aware the ferrules will be permanently crimped onto the tube - and the nut won't be able to be removed from the tube. Do not use on plastic or teflon tubing. This is for steel/stainless/aluminum tubing only. I suppose it would probably work on copper, but these fittings rely on your tubing being nice and round - and stiff enough to take the crimping process. They work great and can handle tens of thousands of psi of pressure.

### ⭐⭐⭐⭐⭐ Good quality
*by D***K on February 23, 2026*

Had to customize 5/16 fuel line and this compression fitting allowed it to work. No leaks

### ⭐⭐⭐⭐⭐ Well made great value
*by J***S on November 13, 2024*

We used these for an oiler to our chain driven over. The couplings worked great. No leaks

## Frequently Bought Together

- Horiznext 5/16 inch Stainless Steel 304 Compression Fitting for tube, connect air line brass pipe, adapt copper brake hose water fuel system (2 pcs)
- Vigorous Stainless Steel Tubing Coil, 3/8" x 25Ft 304 Stainless Steel Tubing, Welded Stainless Steel Tubing

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-01*