Newco Seal Ring / Washer

Newco Seal Rings & Washers: Precision Sealing for Automotive Applications

When it comes to preventing leaks at oil drain plugs, banjo fittings, and other critical fluid junctions, the right seal ring or washer makes all the difference. Newco Products has built a reputation as a go-to source for metric hardware and sealing components, and their seal ring and washer lineup is a direct reflection of that commitment to coverage, precision, and material quality.

What Newco Offers in Seal Rings & Washers

Newco's sealing washer catalog is anchored by two well-regarded product families that cover a wide range of automotive and light-duty applications:

• DIN 7603 Sealing Washers — These are manufactured to the widely recognized DIN 7603 standard, which specifies dimensional tolerances and material requirements for sealing washers used in hydraulic and fluid-carrying connections. Newco offers these in copper and other materials, making them a reliable choice for European vehicle applications where DIN-spec parts are often required.
• Metric Copper Washers / Type A (MTRC Series) — Newco's MTRC copper seal washers, such as the M10x14x1.0 size available in convenient multi-packs, are designed as crush-style, one-time-use washers. The soft copper material conforms under torque to create a leak-free seal, which is especially important at oil drain plugs on German, Japanese, British, and French vehicles with metric drain bolt sizes.

Why Copper Matters for Sealing Washers

Copper is the material of choice for automotive sealing washers because it is soft enough to deform and fill microscopic surface imperfections under bolt torque, yet durable enough to withstand the heat and pressure of engine oil and other fluids. Newco's copper seal washers are engineered to deliver consistent crush characteristics, ensuring a proper seal without over- or under-tightening concerns that can arise with harder materials.

Broad Vehicle Coverage

One of Newco's core strengths is its breadth of metric hardware coverage. Their sealing washers are stocked across a range of inner diameters and outer dimensions to match drain plug specifications found on popular German, Japanese, British, Italian, and French vehicle makes — spanning everything from everyday commuters to classic restoration projects. Whether you're performing a routine oil change or refreshing an older import, Newco's seal ring selection is designed to have the right size on hand.

A Trusted Name in Metric Hardware

Newco Products has long served both professional technicians and DIY enthusiasts who need reliable metric fasteners and sealing components. Their sealing washers are often sold in bulk packs, which appeals to shops and enthusiasts who perform regular maintenance and want to keep quality replacements on the shelf. Browse the full Newco brand catalog or explore the complete range of seal rings and washers to find the right fit for your next service job.