---
product_id: 6136729
title: "111 Buna-N O-Ring, 70A Durometer, Black, 7/16\" ID, 5/8\" OD, 3/32\" Width (Pack of 100)"
brand: "mr o-ring"
price: "NT$1182"
currency: TWD
in_stock: true
url: https://www.desertcart.tw/products/6136729-111-buna-n-o-ring-70a-durometer-black-7-16
store_origin: TW
region: Taiwan
---

# Aerospace Standard AS568A 70A Durometer -30°F to 250°F 111 Buna-N O-Ring, 70A Durometer, Black, 7/16" ID, 5/8" OD, 3/32" Width (Pack of 100)

**Brand:** mr o-ring
**Price:** NT$1182
**Availability:** ✅ In Stock

## Summary

> 🔩 Seal the Deal with Confidence!

## Quick Answers

- **What is this?** 111 Buna-N O-Ring, 70A Durometer, Black, 7/16" ID, 5/8" OD, 3/32" Width (Pack of 100) by mr o-ring
- **How much does it cost?** NT$1182 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/6136729-111-buna-n-o-ring-70a-durometer-black-7-16)

## 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

- • **Durable Hardness Rating:** 70A durometer provides exceptional resistance to penetration and wear.
- • **Precision Sealing Design:** Round cross-section ensures a reliable seal between cylindrical surfaces.
- • **Aerospace Approved Quality:** Meets stringent Aerospace Standard AS568A for unmatched reliability.
- • **Versatile Fluid Compatibility:** Crafted from high-quality Buna-N, perfect for various fluids and hydrocarbons.
- • **Extreme Temperature Resilience:** Engineered to perform in temperatures ranging from -30°F to 250°F.

## Overview

The 111 Buna-N 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, making it ideal for various industrial applications.

## 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

## Product Details

- **Material:** Nitrile Rubber
- **Nominal Inside Diameter:** 0.42 Inches
- **Item Diameter:** 0.63 Inches
- **Brand:** Mr O-Ring
- **Color:** Black

## Images

![111 Buna-N O-Ring, 70A Durometer, Black, 7/16" ID, 5/8" OD, 3/32" Width (Pack of 100) - Image 1](https://m.media-amazon.com/images/I/81VuBT35OeL.jpg)

## Frequently Bought Together

- 111 Buna-N O-Ring, 70A Durometer, Black, 7/16" ID, 5/8" OD, 3/32" Width (Pack of 100)
- 112 Buna-N O-Ring, 90A Durometer, Round, Black, 1/2" ID, 11/16" OD, 3/32" Width (Pack of 100)
- 110 Buna-N O-Ring, 70A Durometer, Black, 3/8" ID, 9/16" OD, 3/32" Width (Pack of 100)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-02-04*