| Standard O-Ring Sizes and Dimensions 
National Hose, Inc. stocks all the AS568A series with standard dash numbers — -001 to -932 — in the most popular compounds. These include Viton® (Fluoroelastomer), Buna-N, Neoprene, Silicone, EPR, AFLAS™, Teflon, and Highly Saturated Green Nitrile. Most JIS series metric O-Rings are also stocked. These are also available in the Buna-N and Fluorocarbon. Several of the above compounds are available in either 70, 75, or 90 durometer. In addition, Teflon encapsulated O-Rings are off-the-shelf items in many sizes. Special compounds such as fluorosilicone, urethane, Chemraz®, Kalrez®, and special "G" series Viton® compounds are also available. Square-cut rings and Q-rings are stocked items and are available in all the AS568 series sizes. National Hose welcomes any inquiries on special non-standard size molded O-Rings. We are totally committed to serving our customers in every way possible. If we don't have what you need, we'll do our very best to get it for you. Chemraz is a registered trademark of Green, Tweed & Co. Kalrez is a registered trademark of Dupont Dow Elastomers Back-up Rings National Hose carries: TEFLON Spiral Back-up Rings in Sizes and Dimensions 28782 SP Series in Dash numbers: -004 to -460. TEFLON Single Turn Sizes and Dimensions 28774 • ST Series Dash Numbers -004 to -475 TEFLON Solid Back-Up Sizes and Dimensions 27595 • ST-S Series Dash Numbers -006 to -475 Contoured Back-Up Rings 8 Series Sizes and Dimensions Series Dash # 8-004 to 8-475 Available in Buna-N & Viton® 90 Duro Square Cut Rings National Hose carries Square Cut Rings in dash sizes 008 to 465. Q Rings National Hose carries Q Rings in dash sizes -003 to -475. We stock several sizes of Q-Ring cord in both nitrile (Buna-N) and Viton®. We can fabricate your special size Q-Rings with a vulcanized joint and ship the same day we receive your order. Call or email to get the right item for the required applications. Our knowledgeable salespeople will be happy to help you. Phone: (713) 920-2030 Fax: (713) 920-1733 (800) 820-HOSE e-mail: nationalhose@nationalhose.com Boston Certification Composite Hose Hydraulic Hose Metal Hose Expansion Joints Packing & Gaskets Couplings Metal Gaskets Clamps Misc. Clamps Fittings O-Rings Gauge Glass V-Belts Truck Accessories |