--- product_id: 154795133 title: ".250'' (1/4\" Actual) Buna-N O-Ring Cord Stock" brand: "mr o-ring" price: "173.56 DT" currency: TND in_stock: true reviews_count: 13 category: "Mr O Ring" url: https://www.desertcart.tn/products/154795133-250-1-4-actual-buna-n-o-ring-cord-stock store_origin: TN region: Tunisia --- # Wide temp range -40°F to 212°F 0.25'' precise diameter Made in USA quality .250'' (1/4" Actual) Buna-N O-Ring Cord Stock **Brand:** mr o-ring **Price:** 173.56 DT **Availability:** ✅ In Stock ## Summary > 🔧 Seal smarter, last longer — don’t let leaks hold you back! ## Quick Answers - **What is this?** .250'' (1/4" Actual) Buna-N O-Ring Cord Stock by mr o-ring - **How much does it cost?** 173.56 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/154795133-250-1-4-actual-buna-n-o-ring-cord-stock) ## 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 - • **Precision Fit Every Time:** Exact 0.25'' diameter ensures seamless sealing in critical applications. - • **Multi-Fluid Compatibility:** Compatible with petroleum, oils, alcohols, and more—your go-to for diverse sealing needs. - • **Durability Meets Versatility:** 70A durometer Buna-N resists abrasion, tear, and compression set for long-lasting performance. - • **Trusted American Craftsmanship:** Proudly made in the USA, guaranteeing premium quality and consistency. - • **Engineered for Extreme Conditions:** Operates reliably from -40°F to 212°F, perfect for demanding environments. ## Overview This .250'' Buna-N O-Ring Cord Stock delivers professional-grade sealing with a 70A hardness rating, engineered to withstand temperatures from -40°F to 212°F. Made in the USA, it offers exceptional resistance to abrasion, tear, and compression set, making it ideal for use with a wide range of fluids including petroleum and alcohols. Perfect for millennial managers who demand reliability and precision in their industrial and automotive projects. ## Description This O-ring cord is made of Buna-nitrile (also called Buna-N), 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, resistance to abrasion, tear, and compression set resistance. It is acceptable for temperature applications between -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C). It 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 O-ring cord 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. Review: Great Value O-Ring Cord Stock! - This is a good value for 100' of .103" o-ring cord stock! It works perfectly in our CNC'd, dovetail cut, valve cover o-ring grooves. Fits perfectly and on a roll that is easy to store on our assembly shelf. We use this in our customers cylinder heads and when they do come back in for service there is shrinkage, but that is to be expected with a rubber material. Cuts easily with an exact-o knife. Review: Great Product with Multiple Applications - This 1/16" O-Ring Cord Stock worked great to fill the gap between a new side mirror and the mirror bezel on my classic car. As a result, the mirror looks very professionally done! ## 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 | B00QVB5A0W | | Best Sellers Rank | #31,046 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #49 in O-Rings | | Brand | Mr O-Ring | | Brand Name | Mr O-Ring | | Color | Black | | Customer Reviews | 4.7 out of 5 stars 501 Reviews | | Item Diameter | 0.25 inches | | Item Weight | 4.8 ounces | | Manufacturer | Mr O-Ring | | Material | Nitrile Rubber | | Material Type | Nitrile Rubber | | Model | AZ-N70.250/10 | | Nominal Inside Diameter | 0.28 inches | | Nominal Outside Diameter | 0.28 inches | | Number of Items | 1 | | Part Number | N70.250/10 | | Unit Count | 1 Count | ## Product Details - **Brand:** Mr O-Ring - **Color:** Black - **Item Diameter:** 0.25 Inches - **Material:** Nitrile Rubber - **Nominal Inside Diameter:** 0.28 Inches ## Images ![.250'' (1/4" Actual) Buna-N O-Ring Cord Stock - Image 1](https://m.media-amazon.com/images/I/712mL2CVl4L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Value O-Ring Cord Stock! *by C***7 on July 21, 2025* This is a good value for 100' of .103" o-ring cord stock! It works perfectly in our CNC'd, dovetail cut, valve cover o-ring grooves. Fits perfectly and on a roll that is easy to store on our assembly shelf. We use this in our customers cylinder heads and when they do come back in for service there is shrinkage, but that is to be expected with a rubber material. Cuts easily with an exact-o knife. ### ⭐⭐⭐⭐⭐ Great Product with Multiple Applications *by S***P on March 7, 2025* This 1/16" O-Ring Cord Stock worked great to fill the gap between a new side mirror and the mirror bezel on my classic car. As a result, the mirror looks very professionally done! ### ⭐⭐⭐⭐⭐ Make you own oring this buna_n holds up fine *by C***2 on November 21, 2025* Needed to make an oring i could not find for a 20-yr old floor jack. received this product I cut it to size then super glued it, then put it in not one but 2 floor jacks a 3 ton and 4-ton model . the oring has held up for 6 months with on and off use . with floor jacks so many are replaced due to a oring going bad and no one sales it without big bucks. yep, saved me from a 600.00 replacement cost im tickled ## Frequently Bought Together - .250'' (1/4" Actual) Buna-N O-Ring Cord Stock - 3M Scotch-Weld Plastic & Rubber Instant Adhesive PR40, Clear, 20 Gram Bottle - .250'' (1/4" Actual) Silicone O-Ring Cord Stock, 70A Durometer, 10' Piece, Red --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/154795133-250-1-4-actual-buna-n-o-ring-cord-stock](https://www.desertcart.tn/products/154795133-250-1-4-actual-buna-n-o-ring-cord-stock) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-08*