---
product_id: 14753780
title: "329 Buna-N O-Ring, 70A Durometer, Black, 2\" ID, 2-3/8\" OD, 3/16\" Width (Pack of 50)"
brand: "small parts"
price: "C$1343"
currency: NIO
in_stock: true
category: "Misc."
url: https://www.desertcart.ni/products/14753780-329-buna-n-o-ring-70a-durometer-black-2-id
store_origin: NI
region: Nicaragua
---

# 329 Buna-N O-Ring, 70A Durometer, Black, 2" ID, 2-3/8" OD, 3/16" Width (Pack of 50)

**Brand:** small parts
**Price:** C$1343
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 329 Buna-N O-Ring, 70A Durometer, Black, 2" ID, 2-3/8" OD, 3/16" Width (Pack of 50) by small parts
- **How much does it cost?** C$1343 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/14753780-329-buna-n-o-ring-70a-durometer-black-2-id)

## Best For

- small parts enthusiasts

## Why This Product

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

## Description

This O-ring is made of black Buna-nitrile, is round in cross-section, has a durometer of 70A, and is designed for use in a wide variety of sealing applications. Buna-nitrile can have high tensile strength, and abrasion, tear, and compression set resistance. It can be used in temperatures between -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C), and is compatible for use with petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light. This Buna O-ring has a shore durometer of 70A. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation. O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter. These Buna-nitrile O-rings meet standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.

## Features

- Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids and hydrocarbons
- Can be used across a wide temperature range from -30 degrees F (-34 degrees C) to 250 degrees F (121 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

![329 Buna-N O-Ring, 70A Durometer, Black, 2" ID, 2-3/8" OD, 3/16" Width (Pack of 50) - Image 1](http://ecx.images-amazon.com/images/I/41BTaje6hCL.jpg)
![329 Buna-N O-Ring, 70A Durometer, Black, 2" ID, 2-3/8" OD, 3/16" Width (Pack of 50) - Image 2](http://ecx.images-amazon.com/images/I/41BTaje6hCL.jpg)
![329 Buna-N O-Ring, 70A Durometer, Black, 2" ID, 2-3/8" OD, 3/16" Width (Pack of 50) - Image 3](http://ecx.images-amazon.com/images/I/31tljcGQidL.jpg)

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**Shop now:** [https://www.desertcart.ni/products/14753780-329-buna-n-o-ring-70a-durometer-black-2-id](https://www.desertcart.ni/products/14753780-329-buna-n-o-ring-70a-durometer-black-2-id)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-03-13*