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Short Description:

Standard AS-568 size Rubber Square Rings can  be used interchangeably in AS-568 standard size O-Ring gland designs.Square Rings can be used in static applications where high sealing load force is required or when the sealing area is too thin to accommodate anything else. In most static applications, it is a direct replacement for an O-ring and generally will perform a high pressure gasket functioning as well as or better than an O-ring. With flat edges on all four sides, square-profile O-rings cover more surface than round-profile O-rings for a better seal in static applications, such as hose, pipe, and faucet connections.

Product Detail

Product Tags

BD SEALS  Square-Rings and Rubber Washers, are occasionally used in basic cost sensitive applications.  Square Rings and Rubber Washers an be molded, machined, or cut cost effectively depending on the size, material, and quantity.Consider replacing Square-Rings with O-Rings or X-Rings that often provide greater performance for the same or lower cost.  Washers are often used when the sealing area is too thin to accommodate anything else.  Complex and critical applications should be discussed with our engineering staff to ensure both performance and price are evaluated.

Square-Ring Sizes: 2-, AS568-, Custom (NO TOOLING  MOULDINGS )

Square-Ring Common Materials: FFKM, Kalrez, Markez, Perlast, Chemraz, FKM, Viton, EPDM, Silicone, Buna-N, NBR, PTFE, Fluorosilicone, Urethane, Aflas, FEP Encapsulated, HNBR, Neoprene, Butyl, Hypalon, Polyacrylate, SBR, Custom, Plastics, Too many to list…

Square-Ring Compliance: FDA, UL, USP Class VI, NSF61, Conductive RFI EMI, Custom Engineered…

Need a custom product design or custom material formulation to improve performance in a specific application to separate yourself from the competition? Let us prove how responsive our product and application engineers are and that our custom products and custom materials often cost less than our competitors’ standards.

Square Cut O-Rings Design

Square Cut O-Rings are exactly like normal O-Rings, except that their cross-sections are square instead of circular. This design increases their working pressure, and form fit more snugly in some spaces.

Square Cut O-Rings have been largely phased out by elastomeric sealing manufacturers since the invention of the Quad Ring, or commonly also called a Q Ring or X-Ring.  Square O-Rings are still available from some manufacturers, but they typically require tooling charges and/or large quantity orders to produce them.

Square O Ring Installation

The Quad Ring has replaced the Square Cut in most cases.  The four-lobed design not only provides lower friction than the Square Cut O-Ring but also, due to its square cross-section, it resists spiral twist.  When the Quad Ring is squeezed upon installation, they seal with the 4 small contact surfaces on the top and bottom.  This also creates a lubricant reservoir formed between the sealing lips that improve performance when startup pressures are exerted.

If your application uses a Square Cut O-Ring, consider switching to the Quad Ring.  The Quad Ring offers many advantages over the Square Cut.  The AS568A sizing is completely interchangeable with O-Rings, Quad Rings and Square Cut O-Rings.

Square Cut Oring Material

  • Material: Buna, Silicone, Viton ,EPDM
  • Certification: AS568A and china  size
  • Downloads: Available Materials of Square Cut O-Rings.pdf, O-Ring Size Chart

mainly production equipment as  following:

the  machine  name  :  High precision dual oil pump fully automatic front top 2RT mold opening hydraulic flat vulcanizing machine


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