3M Respirator Filters and Cartridges — Bayonet & Secure Click

Which 3M respirator filters and cartridges fit your mask?

Short answer: match the mount first, the hazard second. Bayonet cartridges and filters fit the 6000/6500/7500 half masks and 6000/7800/FF-400 full facepieces; Secure Click D-series parts fit only the HF-800 series. Then match color code to hazard — the cartridge color chart and selection guide walk it, and the 3M cartridge roundup ranks the popular setups.

Editor's pick — 3M 2097 P100 filter
The bayonet particulate workhorse — P100 with nuisance organic vapor relief, and the pancake profile that fits under welding hoods. Read the full listing.

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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

Most cartridges and filters on this page use the 3M bayonet connection — but the 17 Secure Click D-series items use 3M’s four-point Secure Click mount instead, and the two systems do not interchange — so a fleet that mixes bayonet and Secure Click facepieces needs two separate cartridge inventories, one per mount. The bayonet platforms:

Browse 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-approved cartridge carries a color code assigned under 42 CFR 84.193 (which applies ANSI K13.1) that signals its protection class at a glance — a fast field check before you mount it. (ANSI/ISEA 110 is a different standard, for smoke escape devices.) The color is a confirmation, not a replacement for reading the label.

Full decode, including combination bands: Respirator Cartridge Color Codes Guide.

Frequently Asked Questions — 3M Respirator Cartridges & Filters

Do Secure Click cartridges fit bayonet masks?

No. Secure Click D-series parts fit only the HF-800 facepieces; bayonet cartridges fit the 6000, 6500, 7500 and compatible full facepieces. The mounts do not interchange, whatever a marketplace listing implies.

Which 3M cartridge do I need?

Match the cartridge to your hazard: organic vapor/solvents → 6001; vapor + dust → 60921; acid gas → 6002; OV + acid gas → 6003; multi-gas → 6006; particulate (silica/lead/mold/welding) → a P100 filter like 2097. Use the hazard table at the top of this page and confirm with an OSHA exposure assessment.

What is the difference between the 6001 and 60921?

Both have identical organic-vapor chemistry. The 60921 adds a bonded P100 particulate filter. Use the 6001 for vapor-only work (brush painting, solvents); step up to the 60921 whenever dust, mist, or overspray is present (spray painting, sanding). Details: 6001 vs 60921.

What is the difference between a 3M cartridge and a filter?

A cartridge captures gases and vapors with chemical sorbent media; a filter is a mechanical barrier that traps particulates (rated N95/P95/P100). Use a cartridge for gases, a filter for particles, and a combination cartridge (60900-series) or cartridge-plus-pre-filter when both are present. See Gas vs Combination Cartridge.

Do I need a 501 retainer?

Only for pre-filters. The 5N11 and 5P71 pre-filters snap onto a gas cartridge using the 3M 501 retainer cap. The 2000-series P100 disc filters (2091, 2097) and the 60900-series combination cartridges attach directly to the bayonet and need no retainer.

Which 3M respirators are compatible with these cartridges?

All bayonet cartridges and filters here fit the 6000, 6500/6500QL, and 7500 half-masks and the 6000 full-face, FF-400, and 7800S full-face respirators. They do not fit the 3M Secure Click (HF-800) series, which needs D-series cartridges.

What cartridge do I need for spray painting?

Spray painting produces vapor and mist, so use combined protection: the 3M 60921 (OV/P100), or pair a 6001 with a 5N11 pre-filter and 501 retainer. For 2K/isocyanate paints, follow the paint maker's respiratory guidance and your exposure assessment.

What 3M filter is best for welding?

Welding generates metal fume plus nuisance ozone/OV. The 3M 2097 (P100 + nuisance OV) is the standard welder's filter; the 2291/2297 advanced filters lower breathing resistance for all-day work.

What does each cartridge color mean?

NIOSH cartridge color codes (42 CFR 84.193 / ANSI K13.1): black = organic vapor (6001), white = acid gas (6002), yellow = OV/acid gas (6003), green = ammonia (6004), olive = multi-gas (6006), magenta = P100 particulate (2091), black+magenta = OV/P100 (60921), olive+magenta = multi-gas/P100 (60926). Full decode: cartridge color code guide.

What is a P100 filter and when do I need one?

P100 is the highest NIOSH particulate rating — 99.97% efficiency, oil-proof. You need P100 for high-toxicity particulates: lead, asbestos, silica, cadmium, welding fume. The 2091 is the most common. For lower-toxicity dusts an N95/P95 pre-filter may suffice — see P95 vs P100 and N95 vs P100.

How often should I replace 3M cartridges and filters?

Gas cartridges follow a change-out schedule (OSHA 1910.134(d)(3)) based on contaminant, concentration, breathing rate, and humidity — never rely on smell or taste. Particulate filters are replaced when breathing resistance rises or they are damaged or soiled; pre-filters load faster than P100 discs. See How Long Do Respirator Cartridges Last?

Are 3M cartridges NIOSH approved, and can I mix brands?

Yes — all are NIOSH-approved under 42 CFR Part 84, but approval applies to the complete 3M facepiece-plus-cartridge assembly. You must use 3M cartridges on 3M facepieces; mixing 3M, Honeywell North, or MSA voids the approval. See Are Respirator Cartridges Universal?

What protects against formaldehyde?

Formaldehyde needs a dedicated cartridge: the 6005 (Formaldehyde/OV), or the 60925 if particulate is also present. Standard OV cartridges are not approved for formaldehyde because it has poor warning properties.

What cartridge handles a mix of solvents, acids, and dust?

The 3M 60923 (OV/AG/P100) combines organic vapor, acid gas, and P100 in one part. For the broadest gas chemistry plus P100, use the 60926. Compare in 60921 vs 60923 vs 60926.

5N11 vs 5P71 — which pre-filter do I use?

The 5N11 is an N95 pre-filter for non-oil particulate; the 5P71 is a P95 oil-resistant pre-filter for oil-based mists. Both attach with the 501 retainer. Full comparison: 5N11 vs 5P71.

Do I need a fit test and medical evaluation?

Yes, for occupational use. OSHA 1910.134 requires a medical evaluation, a fit test on the specific facepiece make/model/size, and a written respiratory protection program before any worker uses a tight-fitting respirator. The cartridge choice does not change those requirements.

Are 3M cartridges reusable?

Cartridge bodies and P100 disc filters are reusable until the change-out schedule, end-of-service-life, rising breathing resistance, or damage requires replacement — they are not single-use. Pre-filters load faster and are replaced more often. The facepiece itself lasts years with proper cleaning and storage.

🔬 Free tool: Not sure which cartridge you need? Use our Respirator Cartridge & Filter Selector to match your hazard to the correct NIOSH color code, filter class and protection factor.

Every listing on this shelf

Bayonet cartridges, filters and retainers (29)

• 3M 6007 Mercury Vapor Organic Vapor Acid Gas
• 3M 60927 Mercury Vapor P100 Cartridge
• 3M 501 Pre Filter Retainer Cap
• 3M 5P71 P95 Pre-Filter
• 3M 5N11 N95 Pre Filter
• 3M 60928 Organic Vapor Acid Gas P100 Cartridg
• 3M 60926 Multi-Gas P100 Cartridge
• 3M 60925 Formaldehyde Organic Vapor Cartridge
• 3M 60924 Ammonia Methylamine Respirator Cartr
• 3M 60923 P100 Acid Gas Organic Vapor Respirat
• 3M 60922 Acid Gas Respirator Cartridge
• 3M 60921 P100 Organic Vapor Respirator Cartri
• 3M 7093C Hydrogen Fluoride P100 Cartridge
• 3M 7093 P100 Respirator Cartridge
• 3M 2076HF P95 Respirator Filter Hydrogen Fluo
• 3M 2078 P95 Respirator Filter Nuisance Acid G
• 3M 2071 P95 Respirator Filter
• 3M 2297 P100 Respirator Filter
• 3M 2296 P100 Respirator Filter
• 3M 2291 P100 Respirator Filter
• 3M 2097 P100 Respirator Filter Nuisance Organ
• 3M 2096 P100 Respirator Filter Nuisance Acid
• 3M 2091 P100 Respirator Filter
• 3M 6006 Multi Gas and Vapor Respirator Cartri
• 3M 6005 Formaldehyde and Organic Vapor Respir
• 3M 6004 Ammonia and Methylamine Respirator Ca
• 3M 6003 Organic Vapor and Acid Gas Respirator
• 3M 6002 Acid Gas Respirator Cartridge
• 3M 6001 Organic Vapor Cartridge

Secure Click D-series (17)

• 3M Secure Click D7P71 P95 Particulate Filter
• 3M Secure Click D8001 Organic Vapor Respirato
• 3M Secure Click D9093CB P100 Filter, Hard Cas
• 3M Secure Click D9093 P100 Respirator Filter,
• 3M Secure Click D3096 P100 Filter
• 3M Secure Click D3076HF P95 + Hydrogen Fluori
• 3M Secure Click D3078 P95 Respirator Filter,
• 3M Secure Click D7N11 N95 Particulate Filter
• 3M Secure Click D80923 OV/AG P100 Cartridge
• 3M Secure Click D3071 P95 Particulate Respira
• 3M Secure Click D8006 Multi-Gas Cartridge
• 3M Secure Click D9093C P100 Hydrogen Fluoride
• 3M Secure Click D8003 Organic Vapor and Acid
• 3M Secure Click D80921 Organic Vapor P100 Car
• 3M Secure Click D80926 Combination Cartridge
• 3M Secure Click D3091 P100 Particulate Respir
• 3M Secure Click D3097 P100 Filter

The Secure Click items above fit the HF-800 series only — none of them mount on a bayonet facepiece, and bayonet parts do not mount on an HF-800. The 5N11 and 5P71 prefilters remain the one bayonet special case: both require the 501 retainer to attach. Host facepieces live on the 3M half mask respirators shelf, and powered-air consumables on the PAPR cartridges shelf.

Our methodology

We pulled all 46 live records on this shelf, split them by mount system — the axis the earlier copy got wrong — and verified hazard classes against each listing’s stated approvals. Respirator selection and use rules come from OSHA 29 CFR 1910.134, and every NIOSH approval is verifiable on the NIOSH Certified Equipment List. We do not fit-test or lab-test respirators and hold no safety certification.

Why trust this page

WC Safety is an independent review site with no products of its own — nothing here is stocked, warehoused or shipped by us. Purchase links go to Amazon and earn an affiliate commission at no extra cost to you; no manufacturer pays for placement, which is why this page discloses broken links, duplicate listings and price drift instead of hiding them — in respiratory protection, a wrong link is a wrong facepiece.

Researched and written by Steven Eaton, editor of WC Safety. Steven holds no safety certification and does not test products; this page compares what manufacturers publish, with the gaps in that record marked. Last reviewed July 2026.