Honeywell North 7504R95 Prefilter 2 Pack

Honeywell North 7504R95 — R95 Oil-Resistant Prefilter, North Cartridge Holder System, 2-Pack

The Honeywell North 7504R95 is a NIOSH 42 CFR 84 R95 oil-resistant prefilter designed for the Honeywell North cartridge holder system — providing 95% oil-resistant particle filtration in a prefilter format compatible with the North 550030 and related holder-equipped respirators, sold as a 2-pack. The 7504R95 provides the same R95 oil-resistant protection as the snap-on 7506R95 but in the holder format designed for the 5500 series facepiece cartridge holder system. For the snap-on format that fits N-series cartridges directly, see the 7506R95. For dry environments without oil, the 7506N95 (N95) is the non-oil-resistant equivalent.

Key Features

• R95 oil-resistant protection in holder format: Same 95% oil-resistant particle filtration as the 7506R95 snap-on prefilter — designed for the North cartridge holder system used on North 550030 and similar facepieces
• Sold as a 2-pack: Two prefilters per package for both holder positions on a North facepiece equipped with the cartridge holder system
• Oil aerosol coverage: R-class filter media maintains ≥95% efficiency in oil mist environments for up to 8 hours per NIOSH testing — required when cutting fluids, coolant mist, or other oil aerosols are present
• Holder system format: Compatible with the specific holder geometry of North cartridge-holder-equipped respirators — confirm compatibility with your facepiece model

Applications — When to Use the 7504R95

The 7504R95 is used in the same oil mist environments as the 7506R95, in facilities using the North cartridge holder format:

• Metalworking with cutting fluid mist: CNC machining, grinding, and turning with water-soluble or oil-based coolants alongside gas cartridge requirements — holder-system facepieces
• Industrial oil mist environments: Hydraulic oil aerosol, lubricant mist, and other petroleum-based aerosols in workplaces also requiring gas protection from the cartridge holder system
• 5500 series respirator users: Workers using North 550030 series facepieces with the cartridge holder system in oil mist applications

Compatible Respirators

The 7504R95 is designed for the Honeywell North cartridge holder system — confirm compatibility with your specific facepiece model. For the snap-on prefilter format that fits all North bayonet gas cartridges, see the 7506R95.

North Cartridge & Filter Line — Full Comparison

These prefilters snap onto North gas cartridges to add particle filtration. For integrated gas+particle protection, see the combination cartridges below.

Browse the complete lineup at Honeywell North Respirator Cartridges & Filters →

OSHA Compliance

• NIOSH approval required: All filters and cartridges in OSHA-mandated programs must be NIOSH approved under 42 CFR Part 84
• Hazard assessment required: OSHA 1910.134(d)(1) — filter/cartridge type must match the documented workplace hazard class
• Fit testing required: OSHA 1910.134(f)(2) — annual fit testing for any tight-fitting facepiece before operational use
• Filter replacement schedule: P-class and N/R-class filters are replaced when breathing resistance increases or visible contamination occurs — not on a fixed time schedule
• Medical evaluation prerequisite: OSHA 1910.134(e) — required before fit testing and before operational respirator use

Frequently Asked Questions

What is the difference between 7504R95 and 7506R95?

Both are NIOSH R95 oil-resistant prefilters with identical protection. The difference is attachment format: the 7506R95 snaps directly onto North N-series gas cartridges; the 7504R95 is designed for the North cartridge holder system used on certain North facepiece models. Confirm which format your respirator uses before ordering.

What is the North cartridge holder system?

Some Honeywell North respirators (including the 550030 series) use a cartridge holder that mounts gas cartridges to the facepiece — with a separate prefilter slot. The 7504R95 fits into this holder system. If your respirator does not use a holder system, use the snap-on 7506R95 instead.

Do I need oil-resistant R95 instead of N95 for cutting fluid?

Yes — cutting fluids (both oil-based and water-soluble emulsions that contain oil) produce aerosols that degrade N-class filter media. R95 or P-class filters are required for oil mist. The 7504R95 R95 is the correct choice for metalworking with coolant.

Is fit testing required?

Yes — OSHA 1910.134(f)(2). Annual fit testing for the facepiece before operational use. The prefilter format does not change the fit test requirement.

How often should I replace the 7504R95?

Replace when breathing resistance increases noticeably, the prefilter is visibly loaded, or after 8 hours of use in oil environments per NIOSH R-class criteria. Establish a written replacement schedule per OSHA 1910.134(d)(3)(iii).

Where can I find all North cartridges and filters?

Browse the complete lineup at Honeywell North Respirator Cartridges & Filters →