O-Rings » Standard Orings, Metric Orings and Custom Designs

Columbia's high performance o-rings are available in a variety of materials, in both standard and custom sizes. Our proprietary compounds are designed to perform in a wide range of applications with varying chemical exposures, pressures and temperatures. Columbia's computer controlled camera inspection system for seals insures the highest level of quality for our customers.

Columbia custom orings can be manufactured to:
> Custom Size
> Custom Material to Customer Specification
> Custom Material to ASTM D2000 Specification
> New Material developed to Solve Application Issue

> Submit RFQ for Custom O-rings

Custom Orings

Speciality O-rings Materials

Liquid Silicone Orings (VMQ)

Special Grade Viton ® Orings (FKM)
> Viton GB, GBL, GLT, GFLT

Hydrogenated Nitrile Orings (HNBR)

Perflouroelastomer Orings (FFKM)

Fluorosilicone Orings (FVMQ)

> Submit RFQ for Speciality O-rings

O-rings » by Material Type

Nitrile O-rings (NBR, Buna-N):
> 70 duro NBR
> 70 duro NBR, NSF 61
> 90 duro NBR
> 70 duro Metric NBR

EPDM O-rings (EPDM, EP, EPT, EPR):
> 70 duro EPDM
> 70 duro EPDM, NSF 61

Fluorocarbon O-rings (FKM, Viton ®, FPM):
> 75 duro FKM, Black
> 75 duro FKM, Brown
> 75 duro Metric Duro

Silicone O-rings (VMQ, PVMQ):
> 70 duro VMQ

Neoprene O-rings (Chloroprene, CR):
> 70 duro CR

Fluorosilicone O-rings (FVMQ):
> 70 duro FVMQ

Oring Structure » How to describe an O-ring

Table: O-Ring Geometry:

Custom O-rings and Metric O-rings are typically described by their Internal Diameter (ID), Radial Cross Section (CS), Rubber Material from which they are constructed plus the material Hardness on a Shore A scale or Columbia Compound Number.

For AS568A Size O-rings, parts are described as the AS568 size with a suffix of the Rubber Material from which they are constructed plus the material Hardness on a Shore A scale or the Columbia Compound Number. For examples of how to indicate an o-ring size, please visit the as568 oring page or the metric oring page.

Columbia engineers are available to assist you in selecting the right oring for your application, including material, size, and mating gland design and associate seal squeeze. Please contact us today to discuss your application.

An oring seals by blocking any potential leak path of a fluid (liquid or gas) between two closely spaced surfaces. The oring is generally installed in a machined groove in one of the surfaces to be sealed. As the two surfaces are brought together, forming a gland, they squeeze the cross section on the oring.

An o-ring is a simple and versatile ring-shaped packing or sealing device with a circular cross section, from which the "O" in its name is derived. O-rings function as compact and reliable sealing devices by absorbing the tolerance stack-up between closely mated surfaces in both dynamic (moving) static (stationary) applications.

O-ring Application » Functional Description

Oring Design » Considerations and Tools

When designing and application utilizing o-rings seals, there are a number of Columbia tools and reference guides available to help identify the correct starting place in material and application design. These tools and materials are Reference Only, and need to be validated in all applications.

Application Factor:
Preliminary Orings Considerations
Material Chemical Resistance
Selecting a Compound Type
Oring Cross Section & ID Sizing
Design to a Standard Size
Gland Sizing Starting Point
Specifying the Rubber for a Part Print