Product family
Rubber O-Rings
For 20 years we’ve molded O-rings to your exact spec — not off a shelf, but to your print. From 0.5 mm cross-sections to 7 cm industrial donut seals, near-flashless and Made in USA, backed by free AS568 and metric reference tools.
Overview
Every standard, plus the ones beyond round
ARC manufactures custom and standard O-rings across the full AS568 range and every major metric standard, molded to your material, hardness, color and tolerance. Our custom tooling, vacuum-environment molding and cryogenic trimming produce near-flashless rings with tight, repeatable cross-sections. We engineer beyond the round ring — cross/quad rings, layered rings, V-seals, wiper seals and U-section profiles — for the sealing geometry your application actually needs. Made-to-print, Made in USA, engineering-led from RFQ to first article.
Have a print or a spec in mind? Request a quote →
Capabilities
Full AS568 range plus ISO 3601, ISO 6149, BS 4518, DIN 3771, SMS 1586, NF T 47-501, JIS B 2401, generic metric
Cross-sections from 0.5 mm up to ~7 cm industrial donut seals
Custom tooling and precision compression/transfer molding to print
Vacuum-environment manufacturing for void-free, high-integrity seals
Cryogenic trimming for near-flashless finished rings
Multiple color and Shore hardness options to spec
Custom cross-section geometries beyond round (X, U, V, layered)
Prototype through production with first-article inspection
What we make
O-rings and profile seals we build
Molded to your exact ID, cross-section, material and hardness — not a catalog part.
Full AS568 dash-number range and international metric sizes.
Four-lobe section for improved dynamic sealing and reduced twist vs. round.
Multi-layer / co-molded rings for specialized chemical or mechanical duty.
Axial face seals for rotating shafts, excluding dirt and fluids.
Scraper/wiper profiles that keep contaminants out of cylinder and rod assemblies.
U-shaped cross-section for pressure-energized, single-direction sealing.
Gallery
Rubber O-Rings we've built
Reference
O-Ring size charts & standards
Free, ungated O-ring size charts and a tolerance calculator — AS568 and every major metric standard. Building to standard sizes? See Standard O-Rings.
Materials we mold & extrude
Industries we serve
Where it's used
Typical applications
Need O-rings to spec?
Send your drawing, sample or service conditions — our engineers confirm the compound, tooling and a path to production.
Custom and Standard O-Rings, Manufactured to Your Specification
American Rubber Corp is a manufacturer of standard and custom rubber and TPV/TPE O-rings made to your specification. Rubber O-rings can be manufactured from a wide range of elastomers and thermoplastic vulcanizate materials to suit many applications, including marine, aerospace, automotive, and general industry, many of which expose our custom seals and O-rings to harsh environments and mission-critical conditions. Custom tooling, molding, extrusion, and the overall transformation of raw materials into a finished product are at the core of the manufacturing industry. When a new product is developed, O-rings are used to seal static and dynamic components of fabricating equipment, or within the final product itself. In the fabrication process, the seals used may need to withstand extreme pressures inside hydraulic presses and offer high chemical resistance to caustic fluids in pumps.
O-Ring Materials and Standards
The international standard ISO 3601 provides a comprehensive list of standard O-rings, and we manufacture these O-rings from a variety of materials to meet your requirements and industry standards. Typical elastomers and TPE that we use for O-rings include Silicone, Fluorosilicone, EPDM, FKM, Neoprene, Nitrile (Buna-N), NBR, HNBR, Santoprene, and many more standard and custom-formulated compounds. Because these O-rings are made to print rather than pulled from stock, we can match the compound to your application, whether it faces hostile environments, extreme pressure, or aggressive chemicals.
Shrinkage Compensation and Material-Specific Tooling
Each elastomer material shrinks at a different rate during manufacturing, so the tooling used to produce an ISO 3601 Nitrile-70 O-ring is not suitable for producing an O-ring in a different material. For example, most Nitrile-70 compounds shrink about 1.8 percent, while most of our silicones shrink 3 to 4 percent during the manufacturing process. To account for this, we maintain custom-sized O-ring tools, dies, and molds for each elastomer material, allowing for shrinkage compensation. This method lets us consistently deliver the best-quality O-rings to our customers, matched precisely to the specified material and dimensions.
Custom O-Ring Specification and Support
We manufacture many types of custom O-rings from a wide range of materials, and the right choice depends on the size, material, and application. With dozens of specifically designed O-rings available, identifying the best option for a given machine can be difficult. Our engineering-led team is always available to help you choose the correct style, material, and size, for everything from commercial machinery to hobby car building, so you can be confident the O-ring you specify will protect your components and extend the life of your equipment.