Hawthorne Rubber Mfg. Corp. stocks, and supplies AS-568A and most common metric size, including a wide variety of non-standard MIL Spec. and government standard O-rings. Standard O-ring sizes range from 1/32" to 26" I.D.'s, 3/32" to 26 1/2" O.D.'s, and cross sections from 1/32" to 1/4".
We also manufacture precision custom molded o-rings, gaskets and seals to your exact specification with a fast and on time delivery.
We use injection, compression and transfer methods to mold O-rings, gaskets and seals in many rubber compounds and durometers. Parts are available in Nitrile (Buna-N, Hycar, Paracril and NBR), Butyl, Neoprene (Chloroprene), Natural Rubber (Polyisoprene), Hypalon, Fluorocarbon (Viton® and Fluorel), Epichlorohydrin, EPDM (Ethylene Propylene), Silicone, Fluorosilicone, Urethane, Polyacrylate, Styrene Butadiene (SBR, GRS and Buna-S), Hydrogenated Nitrile, Vamac®, Herclor, Epichlorohydrin and Kalrez®. Durometers from 25 to 90 Duro. Shore A and formulas are available to meet industrial, milatary, FDA and UL standards.