Part Number: 7604
Category: Pressure Washer Accessories → Spray Nozzles → High-Pressure Spray Nozzles
Type: PNR 1/4" MNPT 0° 40.0 Stainless Steel Spray Nozzle – Pressure Washer Replacement Nozzle

The PNR Stainless Steel Spray Nozzle (Part #7604) is a genuine OEM high-pressure replacement nozzle engineered for commercial, industrial, agricultural, and heavy-duty pressure washing applications. Featuring a 0-degree straight-stream spray pattern and a 40.0 orifice, this nozzle delivers exceptionally high water flow with maximum cleaning impact, making it ideal for high-capacity pressure washer systems performing the most demanding cleaning and surface preparation tasks.

Key Features & Benefits

• Genuine PNR OEM high-pressure spray nozzle
• Part Number: 7604
• Concentrated 0° straight-stream spray pattern
• 40.0 orifice size for high-flow applications
• 1/4" MNPT connection
• Durable stainless steel construction
• Precision-machined for consistent spray performance
• Corrosion and wear resistant
• Maximum cleaning force for heavy-duty applications
• Designed for commercial and industrial pressure washing systems
• OEM-quality construction for long service life

Technical Specifications

Part Number: 7604

Manufacturer: PNR

Product Type: High-Pressure Spray Nozzle

Thread Size: 1/4" MNPT

Spray Pattern: 0°

Orifice Size: 40.0

Nozzle Size: 40.0

Material: Stainless Steel

OEM Replacement: Yes

Compatible Applications

Suitable for use with:

• Pressure washer spray guns
• Pressure washer spray wands
• Pressure washer lances
• High-flow commercial pressure washers
• Industrial cleaning equipment
• Heavy equipment cleaning
• Construction equipment cleaning
• Agricultural equipment cleaning
• Concrete and masonry cleaning
• Industrial surface preparation

Always verify the thread size, nozzle size, operating pressure, flow rate, and machine specifications before ordering.

Function of the Spray Nozzle

The PNR 7604 spray nozzle helps:

• Produce a concentrated 0° high-pressure straight stream
• Deliver exceptionally high water flow with maximum cleaning impact
• Remove stubborn dirt, grease, oil, mud, paint residue, scale, and heavy buildup
• Maintain consistent operating pressure and water flow
• Improve cleaning productivity for demanding industrial and commercial applications

Its 0° spray pattern and 40.0 orifice are ideal for high-flow pressure washer systems requiring maximum cleaning force on industrial equipment, construction machinery, heavy equipment, steel, concrete, and other durable surfaces.

Common Signs Replacement Is Needed

Replace the nozzle if you notice:

• Reduced cleaning power
• Distorted or inconsistent spray stream
• Worn or enlarged orifice
• Clogged nozzle
• Damaged threads
• Corrosion or physical damage
• Increased water flow caused by nozzle wear resulting in pressure loss

Replacing a worn nozzle restores proper spray pattern, operating pressure, and maximum cleaning efficiency.

Installation & Service Notes

• Turn off the pressure washer and relieve system pressure before replacing the nozzle.
• Verify compatibility with the 1/4" MNPT connection and 40.0 orifice size.
• Install the nozzle securely without overtightening the threads.
• Inspect the nozzle seat and threads for debris before installation.
• Test the spray stream after installation to verify proper operation.
• Replace the nozzle if wear causes pressure loss or an inconsistent spray stream.

Important: Match the 40.0 orifice size to your pressure washer's GPM and PSI specifications to maintain proper operating pressure and cleaning performance. The 0° spray pattern delivers maximum concentrated cleaning force and should only be used on durable surfaces. Avoid using it on painted finishes, vehicles, glass, wood, soft materials, or any surface that could be damaged by a concentrated high-pressure stream.

Maintenance Recommendations

• Flush the nozzle with clean water after each use.
• Inspect the orifice regularly for mineral deposits, debris, or wear.
• Clean clogged nozzles using an approved nozzle cleaning tool—avoid using wire or sharp objects that may enlarge or damage the precision orifice.
• Store the nozzle in a clean, dry location when not in use.
• Use only genuine OEM replacement nozzles to maintain proper spray pattern, operating pressure, and long service life.