//Inch Sizes
Inch Sizes 2016-12-29T09:16:42+00:00

Standard O-Ring Cord Inch Sizes & Material

Below is a list of o-ring cord sizes and available materials. A legend is provided at the bottom of this chart.
(“X” indicates material availability)

o_dia


NOMINAL
CROSS
SECTION
(INCH)

ACTUAL CROSS
SECTION (INCH)

(A)

(B)

(C)

(D)

(E)

(F)

(G)

(H)

(I)

(J)

(K)

(L)

(M)

(N)

1/16″

.063 ± .005″

X

1/16″

.070 ± .007″

X

X

X

X

3/32″

.093 ± .007″

X

X

X

X

X

3/32″

.103 ± .007″

X

X

X

X

X

X

X

X

X

1/8″

.125 ± .007″

X

X

X

X

X

X

X

X

1/8″

.139 ± .007″

X

X

X

X

X

X

X

X

X

X

X

X

3/16″

.188 ± .007″

X

X

X

X

X

X

X

3/16″

.210 ± .007″

X

X

X

X

X

X

X

X

X

X

X

X

1/4″

.250 ± .008″

X

X

X

X

X

X

X

X

X

X

X

1/4″

.275 ± .008″

X

X

X

X

X

X

X

X

X

X

X

X

5/16″

.313 ± .008″

X

X

X

X

X

X

X

X

X

X

3/8″

.375 ± .010″

X

 

X

X

X

X

X

X

X

X

X

X

X

13/32″

.406 ± .010″

X

7/16″

.437 ± .012″

X

X

X

X

X

X

X

X

15/32″

.472 ± .015″

X

X

X

X

1/2″

.500 ± .015″

X

X

X

X

X

X

X

X

X

X

X

X

9/16″

.562 ± .015″

X

X

X

X

5/8″

.625 ± .015″

X

X

X

X

X

X

X

X

3/4″

.750 ± .015″

X

X

X

X

X

X

X

7/8″

.875 ± .020″

X

1″

1.000 ± .020″

X

X

X

X

1-1/16″

1.062 ± .030″

X

1-1/8″

1.125 ± .030″

X

1-1/4″

1.250 ± .040″

X

X

1-1/2″

1.500 ± .060″

X

Match the corresponding letter above to determine the type of material.
(A) Buna-N (90 Durometer)
(B) Buna-N (70 Durometer)
(C) Buna-N (50 Durometer)
(D) Buna-N (40 Durometer)
(E) Buna-N (70 Durometer-White)
(F) Neoprene (70 Durometer)
(G) EPR (70 Durometer)
(H) FPM/Fluorocarbon Rubber (75 Durometer-Black)
(I) FPM/Fluorocarbon Rubber (75 Durometer-Brown)
(J) FPM/Fluorocarbon Rubber (90 Durometer-Black)
(K) Silicone (70 Durometer)
(L) Gum Rubber (40 Durometer)
(M) Sponge Closed Cell
(N) Aflas® (75 Durometer)

Contact Us

EPM, Inc.
112 W Burke St.
Stockbridge, GA 30281
800-659-5050
sales@epm.com

Phones and Fax Numbers

Call Free in the US: 800.659.5050
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