---
product_id: 1889522
title: "Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes (Color May Vary)"
brand: "mr o-ring"
price: "19.25 OMR"
currency: OMR
in_stock: true
url: https://www.desertcart.com.om/products/1889522-buna-n-o-ring-kit-70a-durometer-382-pieces-30
store_origin: OM
region: Oman
---

# 30 AS568A dash sizes Wide -30°F to 250°F range 382 precision pieces Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes (Color May Vary)

**Brand:** mr o-ring
**Price:** 19.25 OMR
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal like a pro, wherever you go!

## Quick Answers

- **What is this?** Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes (Color May Vary) by mr o-ring
- **How much does it cost?** 19.25 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/1889522-buna-n-o-ring-kit-70a-durometer-382-pieces-30)

## 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

- • **Portable Precision:** Compact plastic case with labeled compartments keeps your kit organized and ready to go.
- • **Complete Seal Mastery:** 382 premium Buna-N O-rings covering 30 dash sizes for every project need.
- • **Temperature Toughness:** Engineered to perform flawlessly from -30°F to 250°F, no matter the environment.
- • **Aerospace-Grade Assurance:** Meets rigorous AS568A standards for unmatched reliability and quality.
- • **Versatile Fluid Compatibility:** Resistant to petroleum, hydrocarbons, alcohols, and more—your all-in-one sealing solution.

## Overview

This Buna-N O-Ring Kit features 382 durable nitrile rubber rings in 30 standardized AS568A sizes, designed for reliable sealing across a broad temperature range (-30°F to 250°F). Packaged in a portable, organized case, it offers aerospace-grade quality and versatile chemical resistance, making it the essential toolkit upgrade for professionals demanding precision and durability.

## Description

This O-Ring set is made of Black Buna-N, has a durometer of 70A, and includes 382 pieces covering 30 dash sizes. The rings have a Round cross-section and can be used across a wide temperature range from -40 degrees F (-40 degrees C) to 212 degrees F (100 degrees C). The rings come in a plastic storage case designed for organization and portability. Designed for use in a variety of sealing applications, this Buna-N O-Ring set meets standards defined by Aerospace Standard AS568A for quality assurance.The set includes the following O-Rings: 20 pieces each for dash sizes 006, 007, 008, 009, 010, 011, and 012; 13 pieces each for dash sizes 110, 111, 112, 113, 114, 115, and 116; 10 pieces each for dash sizes 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, and 222; 7 pieces each for dash sizes 325, 326, and 327.Buna-nitrile can have high tensile strength, as well as abrasion, tear, and compression set resistance. It is compatible for use with petroleum, hexafluoroacetone (HFA), hexafluoro-2-butyne (HFB) and hydrofluorocarbon (HFC) fluids, vegetable oil, alcohol, acids, and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering, and should not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.The durometer hardness of this Buna-N O-Ring is 70A. Durometers measure 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, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for rubber, while shore D is used for harder plastics.O-rings 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 AS568A dash sizes as well as Metric sizes. O-ring size is defined by the inside diameter (ID), outisde diameter (OD), and cross-sectional (CS) diameter.What's in the box?20 pieces each for dash sizes 006, 007, 008, 009, 010, 011, and 01213 pieces each for dash sizes 110, 111, 112, 113, 114, 115, and 11610 pieces each for dash sizes 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, and 2227 pieces each for dash sizes 325, 326, and 327plastic storage case with label to identify sizes

## Features

- Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons and has a durometer (hardness) of 70A for resistance to penetration
- Includes 382 pieces for covering 30 dash sizes
- For use across a wide temperature range from -30 degrees F/-34 degrees C to 250 degrees F/121 degrees C
- Meets Aerospace Standard AS568A for quality assurance
- Plastic case for portability and organized storage

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Nitrile Rubber |
| Brand | Mr O-Ring |
| Color | Black |
| Manufacturer | Mr O-Ring |
| Unit Count | 382.0 Count |
| Set Name | Buna-N O-Ring Kit |
| Number of Pieces | 382 |
| Product Dimensions | 9.45 x 1.57 x 6.69 inches |
| Item Weight | 12.3 ounces |
| ASIN | B005LRSAT0 |
| Item model number | 650KIT70P |
| Is Discontinued By Manufacturer | No |
| Date First Available | September 30, 2011 |

## Product Details

- **Material:** Nitrile Rubber
- **Brand:** Mr O-Ring
- **Color:** Black
- **Manufacturer:** Mr O-Ring
- **Unit Count:** 382.0 Count

## Images

![Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes (Color May Vary) - Image 1](https://m.media-amazon.com/images/I/917DA8exUgL.jpg)

## Questions & Answers

**Q: could these be used in transmissions**
A: Nitrile rubber, also known as NBR, Buna-N, and acrylonitrile butadiene rubber, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene.  This is an all-around automotive material resistant to oil, petrol, mineral (automatic transmission) oil, water and alcohol.  It has a temperature limit of 225 F.  It is not good for acids and many non-pertroleum solvents.  Transmission gaskets usually require a specific o-ring material as noted by manufacturer.  Search for a compatibility chart on the internet for more specific information.

**Q: What are dash sizes?  Why not just state the actual size in mm?  They're metric o-rings, right?**
A: not sure what the dash is here.  but these are not simply metric sizes.  number 325 is not 325 millimeters.  I am very happy with them.

**Q: Suitable for automotive repair?**
A: Suh,   Yes, can use in automotive applications. I have used them twice on my older Ford Mustang, working just fine. Have also used on hydraulics on my tractor/lawn mower, andwater hoses.   Kind regards, Charles

**Q: are these O rings compatible with Propane such as would be used on BBQ or travel trailer heating?**
A: Yes, I have replaced all the "O" rings on my RV, because of the age with rings from this kit.  Two years and no problems !

## Frequently Bought Together

- Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes (Color May Vary)
- Buna-N O-Ring Kit, 90A Durometer, 30 Sizes (Pack of 382)
- Small Parts KIT-JMN90-30 Japanese Metric O-Ring Kit, Buna-N, Black, 90A Durometer, 30-Sizes (Pack of 391 Pieces)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-02-24*