Description
Overview:
The O-Ring Ø 15.6 x 1.78 for Nilfisk pressure washers is a genuine sealing ring used to maintain watertight and airtight joints in high-pressure cleaning systems. Made from durable elastomer rubber, it provides a reliable seal in fluid connections to prevent leaks and preserve stable operating pressure. This size (15.6 mm diameter with a 1.78 mm section) is specified by Nilfisk for use across selected machines, including the MC 4M and MH 3M ranges. Suitable for routine servicing and repairs, it helps restore performance and reduce unwanted downtime caused by perished or flattened seals. Supplied as an OEM component (OEM No. 301003040), it offers the correct fit and material grade for Nilfisk assemblies used in commercial, industrial, and domestic cleaning tasks.
Key Features:
- Genuine Nilfisk OEM part (301003040) for dependable fit and function on listed models
- Dimensions: Ø 15.6 mm x 1.78 mm (round section) for use in specified Nilfisk assemblies
- Maintains pressure integrity by preventing leaks and air ingress
- Durable elastomer construction suited to water and common pressure-washer detergents
- Helps protect pumps, hoses, and fittings by keeping joints sealed under working conditions
- Supports efficient cleaning performance by sustaining consistent system pressure
- Quick to replace during scheduled maintenance or fault-finding
- Suitable for use in joints such as pump/manifold interfaces and hose or lance connections where this size is specified
Typical Applications:
Replacement seal for Nilfisk pressure washer joints during servicing or repair. Used where this size O-ring is specified, such as around pump components, lance or hose couplings, and valves on MC 4M and MH 3M machines. Common in cleaning tasks on vehicles, plant, patios, yards, workshops, farms, and construction sites.
Also known as:
Sealing ring, pressure washer O-ring, Nilfisk seal ring, washer gasket, rubber gasket ring, hydraulic O-ring, service seal for Nilfisk high-pressure cleaners.
Fits Models:
4M-140/620
4M-160/720
4M140620
4M160720
MC 4M
MC 4M-100/770
MC 4M-140/620
MC 4M-140/620 XT
MC 5M-240/870 PE
MC 5M-250/1000 PE
MC4M
MH 3M
MH3M
MH3M-100/600PA230/1/50
NEPTUNE 2 SPECIAL / MH 2M
POSEIDON 4
POSEIDON PE-DE
SC UNO 4M-5M-6P-7P-8P
Product Specifications
| L&S Part No. | NIL301003040 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Nilfisk |
| OEM No. | 301003040 |
| Unit of Sale | 1 |
| Machine Type | Pressure Washers |
| Fits Brands | Nilfisk |
| Key Features | - Genuine Nilfisk OEM part (301003040) for specified models - Dimensions: Ø 15.6 mm x 1.78 mm for Nilfisk assemblies - Durable elastomer construction for water and detergent resistance - Maintains pressure integrity by preventing leaks - Suitable for MC 4M and MH 3M pressure washers |
| Fits Models | MC 4M - 100/770 | MC 4M - 140/620 | MC 4M - 140/620 XT | MC 5M-240/870 PE | MC 5M-250/1000 PE | MH 3M-100/600 PA 230/1/50 | SC UNO 4M-140/620 PS 230/1/50 | SC UNO 4M-160/720 PS 400/3/50 |
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