---
product_id: 1889522
title: "Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes (Color May Vary)"
brand: "mr o-ring"
price: "B/.106"
currency: PAB
in_stock: true
reviews_count: 8
category: "Mr O Ring"
url: https://www.desertcart.com.pa/products/1889522-buna-n-o-ring-kit-70a-durometer-382-pieces-30
store_origin: PA
region: Panama
---

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

**Brand:** mr o-ring
**Price:** B/.106
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal like a pro, fix like a boss!

## 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?** B/.106 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/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

- • **Temperature Tough:** Engineered to perform flawlessly from -30°F to 250°F, perfect for diverse industrial and home projects.
- • **Organized On-the-Go:** Compact plastic case with labeled compartments keeps your O-rings sorted and ready wherever you work.
- • **Ultimate Size Variety:** 382 premium Buna-N O-rings spanning 30 dash sizes—never hunt for the right fit again.
- • **Aerospace-Grade Quality:** Meets AS568A standards, delivering trusted sealing performance for critical applications.
- • **Durability Meets Precision:** 70A durometer hardness ensures superior resistance to wear, tear, and compression set.

## Overview

This Buna-N O-Ring Kit offers 382 high-quality nitrile rubber rings in 30 standard sizes, designed for reliable sealing across a wide temperature range (-30°F to 250°F). With a 70A durometer hardness and aerospace-grade AS568A certification, it delivers durable, precise performance for plumbing, automotive, and industrial repairs. The included plastic case ensures easy organization and portability, making it an essential toolkit upgrade for professionals and DIYers alike.

## 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

Review: Great O Ring Assortment - I liked the fact that it was a variety pack, and it had the size I needed, at a great price. I needed a couple of small O rings for the hose and wand on my pressure washer, and this product work great. The O rings appear to be not very firm but durable, they are a made of 70 durometer Butna rubber, and not as firm as the (90 durometer nitrile rubber). So far no leaks, and would recommend.
Review: Great Assortment. Thickness Info. - This kit has a great assortment of O-rings of different Dash. I need one for a leaking faucet in my kitchen, but soon found out the old o-ring I was replacing was thiner than the one I got out of this set. I know it's my fault for not measuring the old one's thickness, but I wish this kit would have more info about each piece's thickness. Anyway, I ended up using the o-ring anyway, because I didn't have the time to be looking for the right one anymore, the faucet head won't go in all the way into its base, but it's not leaking anymore . Point is, I will give you the thickness of each ring provided in this kit. I used a caliper and measured each by inch fractions, if you need me to do mm or whole inches, please let me know. I will list the Dash numbers and since most are the same thickness, I will simply place a - between size ranges. Between Dash number 325 - 327 the thickness is 13/64 of an inch. Between Dash number 210 - 222 the thickness is 9/64 of an inch Between Dash number 110 - 116 the thickness is 3/32 of an inch Between Dash number 006 - 012 the thickness is 1/16 of an inch.` Well, that's it for the thickness. As I said, the kit is great for an assortment of diameters, but it may not be that great for those looking for thinner o-rings. I hope this helps.

## 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 |
|---------------|-------|
| ASIN | B005LRSAT0 |
| Best Sellers Rank | #247,497 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #987 in O-Rings |
| Brand | Mr O-Ring |
| Brand Name | Mr O-Ring |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 465 Reviews |
| Item Weight | 12.32 ounces |
| Manufacturer | Mr O-Ring |
| Material | Nitrile Rubber |
| Material Type | Nitrile Rubber |
| Set Name | Buna-N O-Ring Kit |
| Unit Count | 382.0 Count |

## 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)
![Buna-N O-Ring Kit, 70A Durometer, 382 Pieces, 30 Sizes (Color May Vary) - Image 2](https://m.media-amazon.com/images/I/51bid7qjm5L.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 !

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great O Ring Assortment
*by P***T on March 25, 2023*

I liked the fact that it was a variety pack, and it had the size I needed, at a great price. I needed a couple of small O rings for the hose and wand on my pressure washer, and this product work great. The O rings appear to be not very firm but durable, they are a made of 70 durometer Butna rubber, and not as firm as the (90 durometer nitrile rubber). So far no leaks, and would recommend.

### ⭐⭐⭐⭐⭐ Great Assortment. Thickness Info.
*by F***Y on September 12, 2012*

This kit has a great assortment of O-rings of different Dash. I need one for a leaking faucet in my kitchen, but soon found out the old o-ring I was replacing was thiner than the one I got out of this set. I know it's my fault for not measuring the old one's thickness, but I wish this kit would have more info about each piece's thickness. Anyway, I ended up using the o-ring anyway, because I didn't have the time to be looking for the right one anymore, the faucet head won't go in all the way into its base, but it's not leaking anymore . Point is, I will give you the thickness of each ring provided in this kit. I used a caliper and measured each by inch fractions, if you need me to do mm or whole inches, please let me know. I will list the Dash numbers and since most are the same thickness, I will simply place a - between size ranges. Between Dash number 325 - 327 the thickness is 13/64 of an inch. Between Dash number 210 - 222 the thickness is 9/64 of an inch Between Dash number 110 - 116 the thickness is 3/32 of an inch Between Dash number 006 - 012 the thickness is 1/16 of an inch.` Well, that's it for the thickness. As I said, the kit is great for an assortment of diameters, but it may not be that great for those looking for thinner o-rings. I hope this helps.

### ⭐⭐⭐⭐⭐ Very nice quality
*by W***H on May 5, 2024*

This kit seems to be a very nice quality and a few steps above the quality of o-rings of those cheap HF and imported kits. Quick shipping too

## 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 Panama*
*Store origin: PA*
*Last updated: 2026-02-25*