---
product_id: 18711945
title: "109 Silicone O-Ring, 70A Durometer, Red, 5/16\" ID, 1/2\" OD, 3/32\" Width (Pack of 100)"
brand: "mr o-ring"
price: "$19.92"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/18711945-109-silicone-o-ring-70a-durometer-red-5-16-id
store_origin: US
region: United States of America
---

# Aerospace Standard AS568A 70A Durometer -65°F to 450°F 109 Silicone O-Ring, 70A Durometer, Red, 5/16" ID, 1/2" OD, 3/32" Width (Pack of 100)

**Brand:** mr o-ring
**Price:** $19.92
**Availability:** ✅ In Stock

## Summary

> 🔒 Seal the Deal with Confidence!

## Quick Answers

- **What is this?** 109 Silicone O-Ring, 70A Durometer, Red, 5/16" ID, 1/2" OD, 3/32" Width (Pack of 100) by mr o-ring
- **How much does it cost?** $19.92 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/18711945-109-silicone-o-ring-70a-durometer-red-5-16-id)

## Best For

- mr o-ring enthusiasts

## Why This Product

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

## Key Features

- • **Bulk Value Pack:** 100 pieces to keep your projects running smoothly without interruption.
- • **Durable Hardness:** 70A durometer rating provides exceptional resistance to penetration.
- • **Precision Sealing:** Round cross-section ensures a perfect seal between cylindrical surfaces.
- • **Extreme Temperature Resilience:** Withstands temperatures from -65°F to 450°F, perfect for any environment.
- • **Versatile Chemical Compatibility:** Engineered for a wide range of chemicals and fluids.

## Overview

The 109 Silicone O-Ring is a high-performance sealing solution designed for professionals, featuring a 70A durometer for durability, a wide temperature range, and compliance with Aerospace Standard AS568A. Perfect for various applications, this pack of 100 ensures you’re always prepared for any sealing challenge.

## Description

109 Silicone O-Ring, 70A Durometer, Red, 5/16" ID, 1/2" OD, 3/32" Width (Pack of 100)

## Features

- Made of silicone for use with a variety of chemicals and fluids
- Can be used across a wide temperature range from -65 degrees F (-54 degrees C) to 450 degrees F (232 degrees C)
- Round in cross-section to provide a seal between cylindrical overlapping surfaces
- Durometer (hardness) of 70A for resistance to penetration
- Meets standards defined by Aerospace Standard AS568A

## Images

![109 Silicone O-Ring, 70A Durometer, Red, 5/16" ID, 1/2" OD, 3/32" Width (Pack of 100) - Image 1](https://m.media-amazon.com/images/I/71Fbh-mFhNL.jpg)
![109 Silicone O-Ring, 70A Durometer, Red, 5/16" ID, 1/2" OD, 3/32" Width (Pack of 100) - Image 2](https://m.media-amazon.com/images/I/51bid7qjm5L.jpg)

## Customer Reviews

### ⭐⭐ 







  
  
    Labeled -109, but measures like a -110, make sure to check with a calipers
  

*by C***S on Reviewed in the United States on February 6, 2022*

These appear to be high quality silicone orings, but I was shipped the incorrect size of orings. While the bag label indicated 109, they measured as 110. I ordered a second bag of 109 o-rings from this supplier and they are the correct size. I am not sure how they got packaged incorrectly. I'd recommend checking the size with a calipers before you attempt to use them in case the same thing happens to you.A -109 o-ring is the size o-ring to use on keg dip tubes. I was recommended to purchase these and was excited to refresh all of my kegs. The factory o-rings are square -109 sized (5/16" ID, 1/2" OD, 3/16" Thickness).The package I have is labeled "109-S770-100" I'd guess for -109, durometer 70, 100 count, but these aren't 109. After spending far too long trying to make sure I didn't select the wrong size, I grabbed my calipers. The measurements of the o-rings match a -110 size, not a -109.A bit disappointed. I ordered 3 different types of o-rings made by sterling seal & supply. The others seem to be to specification. Maybe this one bag was labeled incorrectly?

### ⭐⭐⭐⭐⭐ 







  
  
    Storz & Bickel Volcano Hybrid Gaskets
  

*by A***W on Reviewed in the United States on August 2, 2021*

I bought these as a bulk alternative to buying straight from S&B. These are a match for the bowl piece, where the bag or hose connects.The gasket fits tighter, the bag and hose fit looser. With the S&B gaskets, it was the other way around for me. This is preferred.

### ⭐⭐⭐⭐⭐ 







  
  
    Works for volcano hybrid
  

*by A***. on Reviewed in the United States on May 15, 2021*

I purchased these to replace the o ring in my volcano hybrid vaporizer. It looked like they would be to small at first but they do fit with a little effort, and they hold the metal bit in place since the little tabs broke off. Quality o rings.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-06*