3M Respirator Filters and Cartridges

Which 3M Filter or Cartridge Do You Need?

Start with the hazard, not the part number · NIOSH 42 CFR 84 · 3M Bayonet Connection · Fits 6000 · 6500 · 7500 · 6000 Full Face · FF-400 · 7800 Series

This is the category hub for the entire 3M reusable respirator system. Most buyers don't arrive knowing a part number — they know a job: spray painting, welding, grinding silica, handling chemicals. The table below maps the hazard to the correct starting 3M cartridge or filter so you can choose with confidence, then drill into the product families, compatibility, and setups beneath it. New to selection? The complete Respirator Cartridge Selection Guide and the 3M Filter & Cartridge Guide walk through every decision.

Always confirm the contaminant and concentration with an exposure assessment (OSHA 1910.134) — this table is a starting point, not a substitute for an assessment.

→ Full Decision Engine: The Complete 3M Filter & Cartridge Guide (2026) — Chart, Color Codes & Job-Site Selection

Cartridge vs Filter: The Distinction That Governs Every Purchase

A cartridge contains chemical sorbent media (activated carbon and chemical-specific beds) that captures gases and vapors — solvents, acid gases, ammonia, formaldehyde — by adsorption and reaction. A filter is a mechanical barrier that traps particulates — dust, mist, lead, asbestos, silica, welding fume — and is rated N95, P95, or P100 (99.97%, oil-proof). Gas cartridges do nothing against particles; particulate filters do nothing against gases. When a job produces both (spray painting = vapor + mist), you need a combination cartridge (the 60900-series) or a gas cartridge plus a particulate pre-filter. Still unsure which class applies? Read Organic Vapor vs P100 and Gas Cartridge vs Combination Cartridge.

How a 3M Respirator System Works

A reusable 3M respirator is a system, not a single item. Understanding the four building blocks eliminates the most common buying mistakes:

• Facepiece — the reusable half- or full-face respirator (e.g. the 3M 7500 series). Fit-tested, worn for years.
• Cartridge — gas/vapor protection that twists onto the bayonet (e.g. 6001).
• Filter / pre-filter — particulate protection: a bayonet P100 disc (2091) or a snap-on pre-filter (5N11/5P71).
• Retainer — the 3M 501 retainer cap that holds a 5N11/5P71 pre-filter onto a gas cartridge.

Two valid ways to add particulate protection to a vapor job:

The 5N11/5P71 path is cheaper per change but has more parts; the 60921 path is simpler and cleaner. Compare the pre-filters in 5N11 vs 5P71.

3M Cartridge & Filter Product Families

3M organizes every bayonet product into four families. Choosing the right family first — gas-only, combination, particulate, or pre-filter — narrows the decision instantly.

① Gas & Vapor Cartridges (gas-only)

Protect against gases/vapors only — pair with a separate filter if particulate is present.

• 6001 — Organic Vapor · review
• 6002 — Acid Gas · review
• 6003 — OV/Acid Gas · review
• 6004 — Ammonia/Methylamine · review
• 6005 — Formaldehyde/OV · review
• 6006 — Multi-Gas · review

② Combination OV/P100 Cartridges (gas + bonded P100)

Gas/vapor chemistry plus a permanently bonded P100 filter — one part for dual hazards.

• 60921 — OV/P100 · review
• 60922 — Acid Gas/P100 · review
• 60923 — OV/AG/P100 · review
• 60925 — Formaldehyde/OV/P100 · review
• 60926 — Multi-Gas/P100 · review

③ Particulate Filters (bayonet)

Particulate-only filters that twist directly onto the bayonet — no retainer required.

• 2091 — P100 · review
• 2097 — P100 + nuisance OV · review
• 2096 — P100 + nuisance AG · review
• 2291 — P100 Advanced (low resistance)
• 2297 — P100 Advanced + nuisance OV
• 7093 — P100 hard-case (full-face favorite) · review

④ Pre-Filter Assemblies (cartridge add-on)

Economical N95/P95 pre-filters that snap onto a gas cartridge with the 501 retainer.

• 5N11 — N95 pre-filter
• 5P71 — P95 oil-resistant pre-filter
• 501 — Filter retainer cap (holds 5N11/5P71)

6001 vs 60921 — The Upgrade Decision

This is the single most common — and most expensive to get wrong — decision on this page. The 6001 and 60921 share identical organic-vapor chemistry; the 60921 simply adds a bonded P100 particulate filter. The question is whether your job produces particles.

When in doubt and particulate might be present, the 60921 removes the risk for a small price premium. Full breakdown: 3M 6001 vs 60921. Also useful: 6003 vs 6006, 6002 vs 60922, 2091 vs 2097, and the 60921 vs 60923 vs 60926 comparison.

Most Popular 3M Cartridge Setups

Real-world builds by job. Each pairs a fit-tested 3M facepiece (the 7500 series shown here) with the correct cartridge or filter.

Compatible 3M Respirators

Every cartridge and filter on this page uses the 3M bayonet connection, so one cartridge inventory covers your whole fleet of 3M reusable respirators. The bayonet platforms:

Shop the facepieces: 3M Half-Mask Respirators and 3M Full-Face Respirators. Wondering whether other brands fit? See Are Respirator Cartridges Universal? (they are not — match brand to brand).

Understanding 3M Cartridge & Filter Color Codes

Every NIOSH cartridge carries an ANSI/ISEA 110 color band that signals its protection class at a glance — a fast field check before you mount it. The color is a confirmation, not a replacement for reading the label.

Full decode, including combination bands: Respirator Cartridge Color Codes — ANSI/ISEA 110 Guide.

3M Cartridge Selection Chart

The full reference at a glance. "P100?" indicates a bonded or integral P100 filter.

Change-Out Schedule: Gas/vapor cartridges have no visible "full" indicator — by the time you smell or taste the contaminant, breakthrough has already occurred. OSHA 1910.134(d)(3)(iii) requires a change-out schedule based on the contaminant, concentration, work rate, and humidity. Particulate filters are replaced when breathing resistance rises or they're damaged or soiled. Build a compliant schedule with How Long Do Respirator Cartridges Last?

Frequently Asked Questions — 3M Respirator Cartridges & Filters