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Hydraulic Boss O-Rings

Hydraulic Boss O-Rings for use with Hydraulic tube fittings.

There is 20 standard sizes for O-rings used to seal straight-thread tube fittings on a boss. A boss Tube fitting with boss seal is cylindrical projection on a casting or forging. The end of that projection is machined to provide a flat, smooth surface for sealing. Straight threads used with an O-ring provide a better seal than tapered threads used alone. Although made in a variety of o-ring compounds the most common Boss O-rings are Buna-N in 90 Durometer.

The 900 series of dash numbers identifies the 20 sizes of boss seals. Except for size -901, the digits after the 9 identify the nominal tube size in 16ths of an inch. The tube size is its outside diameter (OD). For example, size -903 is intended for use with 3/16-inch tube. The one exception, size -901, is intended for use with 3/32-inch tube. 1/16-inch tube is not common in aircraft use.

AS568 O-RING INCH SIZES

AS568 is the Aerospace Size Standard for O-rings from the Society of Automotive Engineers. The O-Ring Store LLC manufactures and supplies the complete range of standard AS568 sizes in a wide range of elastomeric O-ring materials. Link to the Compounds and O-Ring sizes, grouped by cross-section and listed numerically by inside diameter. AS568 O-Rings To make it easy you can search for all compounds by size, just use "AS568-010" in the search box.

METRIC O-RINGS - STANDARD, EUROPEAN, AND JAPANESE SIZES

The O-Ring Store LLC manufactures and supplies a complete range of Metric O-Rings in ISO3601 International Organization for Standardization, British Standard BS1806 O-ring sizes (imperial) -replaced by ISO3601 standard, British Standard BS4518 Metric O-ring Sizes and Japanese Standard JIS B 2401 (P, G and V) O-ring sizes. Link to the Compounds and O-Ring sizes, grouped by cross-section and listed numerically by inside diameter. Metric O-Rings To make it easy you can search for all compounds by size, just use the cross section X inside diameter x "2.00X024" in the search box.

We are a family owned and operated Distributor and Manufacturer of O-Rings, O-Ring Kits, OSK™ O-Ring Service Kits, Hydraulic Seals, Adhesives, Lubricants, Braided Packings, Coatings, O-Ring Cord, Lathe Cut, Oil and Shaft Seals, Gaskets, Retaining Rings, Molded Packings, Seals, and Molded Rubber Products.

We serve many industries, including manufacturing, chemical processing, defense, power generation, agricultural, water treatment and filtration, hydraulics, fluid power, heavy truck, automotive, aerospace, oil and gas, medical and life sciences, food and beverage, electronics and industrial controls, refineries, and supply chain suppliers. Each industry and each customer have unique requirements that make them special. We love sharing customer stories and applications at our weekly store meeting.