---
product_id: 286034857
title: ".139'' (1/8\" Nominal) Buna-N O-Ring Cord Stock, 70A Durometer, 0.139\" Thickness, 10' Piece, Black"
brand: "small parts"
price: "21345CFA"
currency: XOF
in_stock: true
reviews_count: 6
category: "Small Parts"
url: https://www.desertcart.sn/products/286034857-139-1-8-nominal-buna-n-o-ring-cord-stock
store_origin: SN
region: Senegal
---

# -40°F to 212°F wide temp range 70A Durometer hardness Made in the USA quality .139'' (1/8" Nominal) Buna-N O-Ring Cord Stock, 70A Durometer, 0.139" Thickness, 10' Piece, Black

**Brand:** small parts
**Price:** 21345CFA
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal the deal with precision and confidence!

## Quick Answers

- **What is this?** .139'' (1/8" Nominal) Buna-N O-Ring Cord Stock, 70A Durometer, 0.139" Thickness, 10' Piece, Black by small parts
- **How much does it cost?** 21345CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/286034857-139-1-8-nominal-buna-n-o-ring-cord-stock)

## 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

## Key Features

- • **Consistent 0.139" Thickness:** Exact sizing for custom O-rings that fit perfectly—no guesswork, just precision.
- • **Trusted American Manufacturing:** Proudly made in the USA, guaranteeing premium quality and supply chain transparency.
- • **Precision-Crafted Buna-N Material:** Engineered for superior resistance to oils, fuels, and hydrocarbons—your go-to for reliable sealing.
- • **Versatile Temperature Performance:** Operates flawlessly from freezing -40°F to scorching 212°F, ensuring durability in extreme conditions.
- • **Proven Reliability in Critical Applications:** Highly rated by professionals for leak-proof performance in engines and industrial kits.

## Overview

This 10-foot Buna-N O-Ring Cord Stock features a 0.139" thickness and a 70A durometer hardness, delivering exceptional resistance to oils and hydrocarbons. Engineered to perform reliably across a broad temperature range (-40°F to 212°F), it’s made in the USA to ensure premium quality. Ideal for custom O-ring fabrication, it’s trusted by professionals for leak-proof sealing in demanding industrial and mechanical applications.

## Description

Rubber Cord

Review: Works well for making o-rings - The cord is exactly the size stated. I wish there were a wider selection of sizes as this was slightly too small for my use.
Review: Good product. - Seams to be a good product. I used it to make an o-ring to go in a propane conversion kit on a predator engine. No leaks so far after a few months of use

## Features

- O-Ring Cord made of Buna-N (Nitrile, NBR) for use with a variety of fluids and hydrocarbons
- Durometer (hardness) of 70A
- For use across a wide temperature range from -40 degrees F (-40 degrees C) to 212 degrees F (100 degrees C)
- Made in the U.S.A.
- Available in various cross sections and lengths

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00QVB64LQ |
| Best Sellers Rank | #229,057 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #895 in O-Rings |
| Brand | Small Parts |
| Brand Name | Small Parts |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 47 Reviews |
| Item Diameter | 0.14 Inches |
| Manufacturer | Small Parts |
| Material | Nitrile Rubber |
| Material Type | Nitrile Rubber |
| Model | AZ-N70.139/10 |
| Nominal Inside Diameter | 0.14 Inches |
| Nominal Outside Diameter | 0.14 Inches |
| Number of Pieces | 10 |
| Part Number | N70.139/10 |
| Unit Count | 1.0 Count |

## Product Details

- **Material:** Nitrile Rubber
- **Nominal Inside Diameter:** 0.14 Inches
- **Item Diameter:** 0.14 Inches
- **Brand:** Small Parts
- **Color:** Black

## Images

![.139'' (1/8" Nominal) Buna-N O-Ring Cord Stock, 70A Durometer, 0.139" Thickness, 10' Piece, Black - Image 1](https://m.media-amazon.com/images/I/712mL2CVl4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well for making o-rings
*by T***N on August 7, 2024*

The cord is exactly the size stated. I wish there were a wider selection of sizes as this was slightly too small for my use.

### ⭐⭐⭐⭐⭐ Good product.
*by M***. on April 3, 2024*

Seams to be a good product. I used it to make an o-ring to go in a propane conversion kit on a predator engine. No leaks so far after a few months of use

### ⭐⭐⭐⭐⭐ As advised
*by E***K on June 1, 2021*

Product as advertised and worked for me.

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-06-18*