.125" (3.18mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black

Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot

We spool 100' runs in house. Longer runs will be depending on factory production.

Our Round Buna-N Nitrile O-Ring Cord is a cornerstone for a multitude of industries, offering a dependable sealing solution for hydraulic and pneumatic systems. Crafted from premium nitrile rubber, this O-ring cord stands up to oil, fuel, and a range of chemicals, making it an exemplary choice for a variety of sealing needs. It features a round cross-section, providing exceptional strength and flexibility. This design enables customization to any required length and shape, catering to unique application requirements. Ideal for sectors ranging from automotive to marine, and agricultural to plumbing, our Round Nitrile O-Ring Cord combines flexibility, durability, and performance, ensuring it is a preferred option across industries.

Why Choose Nitrile, Buna-N O-Ring Cord (NBR)?

Nitrile, known as Buna-N or NBR, is a widely used elastomer in sealing applications due to its remarkable resistance to petroleum-based oils and hydrocarbon fuels. Operating efficiently within a temperature range of -40°F to +250°F, it boasts excellent tensile strength and abrasion resistance. Compatible with most dilute acids, silicone oils, lubricants, and water applications, NBR is versatile. However, it is advisable to avoid its use with ketones, aromatic hydrocarbons, and phosphate ester hydraulic fluids.

Calculating the Required O-Ring Cord Length

O-Ring Cord Cut-Length Calculator

To ensure you purchase just the right amount of cord for your needs, we offer an O-Ring Cord Cut-Length Calculator. The formula to calculate the necessary cord length is: ((OD + ID) / 2) x Pi = Length, where Pi = 3.14159, and the Inside Diameter (ID) is derived from the Outside Diameter (OD) minus twice the cross-section (C/S): ID = OD - (2 x C/S).

By providing O-ring cord by the foot, we aim to make your sealing projects more efficient and cost-effective. This flexibility, coupled with our high-quality materials and commitment to excellence, underscores our dedication to making getting O-Rings easy for our valued customers.