Standard and Custom Rubber Grommets Over 50 Years of Service Since 1947   For more than 50 years, Hawthorne Rubber Manufacturing Corporation has been a supplier of both standard and precision custom molded rubber grommets to the exact specifications of OEM, industrial, laboratory and engineering development groups. We mold custom rubber grommets in many different materials in a wide range of durometer hardnesses. These linked pages of standard grommets sizes has been developed and organized into an easy to use lookup source. The form on the next linked page can be used to inform us of what your grommet needs are. We also have a toll free FAX number, 800-643-2580, that can be used to send us your blue print drawings and requests for quotation. Standard MS35489 Military Nitrile Rubber Grommets These grommets listed in the following page are standard Army-Navy grommets that have a BN-50 material identification and meet MIL-G-3036 and MS35489 specifications. They are made from black Buna-N rubber. Shore A durometer hardness of 50. Temperature range is -45°F to 250°F. A complete chart listing of the MS35489 sizes is also available. Standard Styrene Butadiene Rubber Grommets These grommets listed in the following page are made from a black SBR (styrene butadiene rubber) compound. The hardness is 55 Shore A durometer. Temperature range of -35°F to 180°F. Online Grommet Request For Quotation Form The form on the next linked page can be used to inform us of what your custom and standard grommet needs are. Hawthorne Rubber Mfg. Corp. P.O. Box 171 35 Fourth Avenue Hawthorne, NJ 07507-0171 Phone: 973-427-3337 FAX: 973-427-8233 or 800-643-2580 e-mail address: John@hawthornerubber.com ...Home Page, Hawthorne Rubber Mfg. Corp.