Cord: Sizes & Compounds

Global O-Ring and Seal carries nearly 500 cord varieties with more than 1 million feet of cord in stock – in combinations of the profile, material, cross-section, durometer, and color. All of our cord is made in the USA and adheres to strict quality standards.

We offer cord cut to any length or by the spool, and we also use our cord to produce vulcanized o-rings.

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Cord Sizes

The table below lists the most common sizes (and tolerances according to the ARPM Class E2) in both inch and metric dimensions.

We can also offer tighter tolerances, so please call or request a quote if you require more precision and we will find a solution.

Inch MM Common Name Tolerance Low High

Cord Compounds

We offer many different compounds on cord stock and for use in making vulcanized o-rings. This table lists all of our standard compounds and their properties.

We can also provide custom extrusions in any shape, size, material, color, etc. If you need a special compound not covered by this list, please call or request a quote.

Cord Compounds Material Data Sheet Description Durometer Color Temp Range (F)
A75 AFLAS General purpose 75 Black -14 to +428
N50 Buna-N General purpose 50 Black -40 to +212
N70 Buna-N General purpose 70 Black -40 to +212
N90 Buna-N General purpose 90 Black -40 to +212
V75 Viton High chemical resistance 75 Black -15 to +450
BV75 Viton High chemical resistance 75 Brown +1 to +450
SV75GF Viton Low temperature, high compression resistance 75 Black -2 to +400
V90 Viton High chemical resistance 90 Black -15 to +450
E70 EPDM General purpose 70 Black -67 to +257
S50 Silicone FDA-Grade, food safe, medical applications 50 Red -76 to +437
S70FDA Silicone FDA-Grade, food safe, medical applications 70 Red -76 to +437
SN70 Buna-N Square cord 70 Black -40 to +212
QN70 Buna-N Quad cord 70 Black -40 to +212
WN70 Buna-N General purpose 70 White -40 to +212
WE70 EPDM FDA-Grade 70 White -67 to +257
WV75FDA Viton FDA-Grade 75 White -2 to +400
C70 Neoprene Environmental resistance 70 Black -40 to +212
F70 Fluorosilicone FDA-Grade, food safe, medical applications 70 Blue -76 to +350
HNBR80 HNBR Heat/Chemical resistance 70 Black -40 to +302
HNBR90 HNBR Heat/Chemical resistance 90 Black -40 to +302