3M 6000 Full-Face Respirator Replacement Parts: 6700, 6800 and 6900

Which replacement parts fit the 3M 6700, 6800 and 6900?

Short answer: every 3M 6000 full-face respirator replacement part fits all three facepieces — the 3M 6700 (small), 3M 6800 (medium) and 3M 6900 (large) — because size lives in the faceseal, not in the serviceable components. The head harness (3M 6897), lens assembly (3M 6898), nose cup (3M 6894), center adapter (3M 6864), valves and gaskets are one part number across all three sizes. OSHA 29 CFR 1910.134(h)(4) requires that repairs use only the respirator manufacturer's NIOSH-approved parts designed for that respirator, installed by someone appropriately trained — so the part numbers on this page come straight from 3M's current 6000-series user instructions, not from marketplace listing titles.

Why this matters.
A respirator with a damaged or deteriorated component must come out of service until it is properly repaired or replaced — that is not advice, it is OSHA 29 CFR 1910.134(h). Paragraph (h)(4)(i) is specific: repairs "shall use only the respirator manufacturer's NIOSH-approved parts designed for the respirator." A generic "compatible" valve or a harness that merely resembles the 3M 6897 voids the NIOSH approval of the assembly and leaves the wearer with an unapproved respirator. OSHA's own guidance puts it bluntly: never substitute, modify, add or omit parts.

This reference covers the reusable full-facepiece side of the 3M 6000 platform only. It is written for safety managers keeping a respirator program compliant, maintenance leads stocking a parts cabinet, and individual owners deciding whether a $19 harness or a $180 facepiece is the right fix. The part numbers, component descriptions and configuration restrictions below are taken from the current 3M Full Facepiece Respirator 6000 Series User Instructions (© 3M 2025) and cross-checked against OSHA's respiratory protection FAQ. Filters and cartridges are deliberately excluded — they are consumables with their own selection logic, covered in the 3M Filter Cartridge Guide.

The three facepieces, and where the part numbers come from

3M sells the 6000 full-face series as three sizes of one design. The facepiece itself carries a NIOSH-approved configuration; the ****AAD numbers you will see on packaging are catalog numbers only — NIOSH approvals cite the PSD part numbers.

If you are still choosing between the three sizes — or between this platform and its stablemates — start with the Respirator Sizing Guide and the Best 3M Full Face Respirator roundup. The complete facepiece is stocked as the 3M 6000 Series Full Face Respirator (6700 / 6800 / 6900).

Verified replacement parts matrix — standard bayonet configuration

Affiliate disclosure: as an Amazon Associate I earn from qualifying purchases. Amazon links below go to listings verified against the exact 3M part number; where no credible exact listing exists, the row says so instead.

These are the serviceable components of a standard bayonet-cartridge 6000 facepiece, in the order 3M's own parts diagram lists them. Every row fits the 6700, 6800 and 6900.

The DIN-port configuration is a different parts list

3M also documents an alternate center-port configuration built around a DIN thread connection instead of the standard exhalation-only adapter. Unless your written program and NIOSH approval configuration specifically use the DIN port, you do not need any of these — an ordinary bayonet-cartridge 6700, 6800 or 6900 uses the 3M 6864 assembly above. Converting between configurations is done per 3M's replacement instructions, installing the 3M 6880 bayonet caps with 3M 6895 gaskets or the 3M 7980 full-face plug as the configuration requires.

Amazon package quantities vary by listing. Confirm the quantity before ordering.

What is shared across sizes — and the one thing that is not

Every replacement part in the tables above is size-agnostic: one 3M 6897 harness fits the 6700, 6800 and 6900; one 3M 6898 lens assembly serves all three. The size difference between the three facepieces lives in the faceseal — the molded silicone skirt that touches the face — and 3M's 6000-series parts list does not offer the faceseal as a separately catalogued replacement part. In practice that means a torn, hardened or distorted faceseal is a facepiece decision, not a parts order: replace the complete 3M 6000 Series Full Face Respirator (6700 / 6800 / 6900) in the correct size.

Two more components are explicitly marked "not available separately" in 3M's list: the center adapter cover and the center adapter base. Both come only inside the 3M 6864 (or 6884) assembly. If a marketplace listing offers you a bare 6000-series adapter cover or base as a standalone part, it is not a 3M catalog item.

Symptom to part: what a failed component looks like

Repair or replace: the decision, without a magic percentage

There is no honest "repair if parts cost under 50% of a new mask" rule — respirator condition and the manufacturer's instructions control the decision, and OSHA 1910.134(h)(4)(ii) requires repairs to follow the manufacturer's recommendations for the type and extent of repair. Economics only breaks ties between two options that are both compliant.

Replacing the common wear parts, in 3M's order

The sequence below condenses 3M's replacement-part instructions for the highest-turnover components. Repairs must be made by someone appropriately trained; if that is not you, this section tells you what the trained person will do, not how to improvise.

1. Remove the nose cup. Pull the 3M 6894 nose cup assembly away from the center adapter inside the facepiece.
2. Remove the center adapter. Grasp the adapter at the cover, twist counter-clockwise a quarter turn to disengage its bayonet from the lens, and withdraw it from the center port.
3. Service the exhalation valve. Pull the old valve's stems out of the seat, inspect the seat for dirt or damage, and snap a new 3M 7583 or 6583 in from the opposite side until both stems seat with an audible click of the cover.
4. Service inhalation valves and gaskets. Lift 3M 6893 valves off their posts and install new ones under all three lugs, flat and free-spinning; swap 3M 6895 gaskets under all three bayonet lugs at each port.
5. Reinstall in reverse. Align the adapter base tabs with the lens notches, twist clockwise to the stop, confirm the 3M 6896 gasket is seated, and press the nose cup back on, arrows aligned.
6. Seal check, then back to service. Conduct a negative-pressure user seal check before the respirator is worn in a contaminated atmosphere — and remember a seal check verifies donning, not fit.

The full teardown for a lens or frame swap (screws, alignment marks, faceseal transfer) follows the same logic and is diagrammed in the 3M instructions linked in the methodology block below. After any reassembly, run the inspection sequence in Respirator Maintenance Inspection Storage, verify the seal per How to Seal Check a Respirator, and clean per How to Properly Clean a Respirator Safely. A user seal check after reassembly does not replace fit testing — the annual requirement lives in How to Fit Test a Respirator.

Post-reassembly checklist

• All inhalation valves flat, engaged under all three lugs, spinning freely.
• Exhalation valve stems fully seated; valve cover clicked onto the adapter base.
• Center adapter twisted to the stop with the 3M 6896 gasket compressed evenly.
• Frame alignment marks matched top and bottom; screws snug.
• Port gaskets present under every bayonet lug.
• Negative-pressure seal check passed; no aftermarket component anywhere in the assembly.

Accessories are not repair parts

These items support the facepiece but are not part of the sealed respirator assembly. Keep them out of your repair-parts bin so a lens cover never gets counted as a lens.

Verified replacement parts available on Amazon

The short list most 6000-series owners actually need, verified against the exact 3M part numbers on 2026-08-17.

Confirm the manufacturer part number and package quantity before ordering. Use only the exact part specified for the respirator configuration.

Frequently asked questions

What replacement head harness fits the 3M 6800?

The 3M 6897 head harness assembly (catalog 37005) is the harness for the 3M 6800 — and the same part fits the 6700 and 6900, because 6000-series harnesses are not size-specific. Replace it when the straps no longer hold adjustment or an attachment point tears; the swap instructions ship with the replacement harness.

Does the 3M 6897 fit the 6700, 6800 and 6900?

Yes. 3M's 6000-series parts list assigns one head harness assembly, the 3M 6897, to all three facepiece sizes. Size is set by the faceseal molded into each facepiece, not by the harness.

What replacement lens fits the 3M 6800?

The 3M 6898 lens assembly — a hard-coated polycarbonate lens that arrives with bayonet port fittings, inhalation valves and port gaskets already installed. It fits the 6700 and 6900 as well. A cracked or crazed lens means the facepiece comes out of service until the assembly is replaced per 3M's steps.

Does the 3M 6898 lens fit all three 6000 full-face sizes?

Yes — one lens assembly across the 6700, 6800 and 6900. It does not fit any 3M half mask; half masks have no lens, and half-mask diagrams use a different parts family. Keep full-face and half-mask parts bins separate.

What is the difference between the 3M 6893 and 6889?

The 3M 6893 is the inhalation valve used at the facepiece bayonet ports and inside the nose cup of every 6000 full facepiece. The 3M 6889 is an exhalation valve that belongs to the DIN-port configuration's parts list. They are not interchangeable — a valve is specified per location and per configuration.

When should a 3M 6800 facepiece be replaced instead of repaired?

When the failed component is not on 3M's replacement-parts list: a torn or hardened faceseal, a structural crack in the facepiece body or a port, or damage across so many components that the rebuilt mask would be mostly new parts anyway. 3M catalogues no separate 6000-series faceseal, so seal deterioration is a facepiece decision. Anything with unknown aftermarket parts installed also comes out of service until restored to the approved configuration.

Can I buy the faceseal for a 3M 6700, 6800 or 6900 by itself?

No. The current 3M 6000-series parts list does not include the faceseal as a separately orderable component — the frame kit, lens, harness, nose cup, adapter, valves and gaskets are serviceable, and the faceseal is not among them. Replace the facepiece in the correct size when the seal itself is damaged.

What does "not available separately" mean on the 3M parts list?

It marks components 3M only supplies inside an assembly. For the 6000 full-face series that is the center adapter cover and center adapter base, which come only as part of the 3M 6864 standard adapter or 3M 6884 DIN adapter. A standalone listing for one of those pieces is not a 3M catalog item.

Is the exhalation valve for the 3M 6800 the 7583 or the 6583?

3M's current 6000-series instructions list the standard center adapter's exhalation valve as "7583 or 6583" — either number is the manufacturer-specified part. The verified Amazon listing at the time of review is the 3M 6583 sold as a 10-pack; check the quantity before ordering.

Are generic "compatible with 3M" valves acceptable replacements?

No. OSHA 29 CFR 1910.134(h)(4)(i) requires "only the respirator manufacturer's NIOSH-approved parts designed for the respirator." A generic valve — however similar — makes the assembly an unapproved respirator. That is also why this page leaves a part unlinked rather than pointing at an aftermarket substitute when no exact 3M listing exists.

Are 3M 6000 replacement parts "OSHA approved"?

No part is "OSHA approved" — OSHA does not approve retail parts at all. OSHA sets employer requirements, including who may repair a respirator and with what parts; NIOSH approves the respirator configuration those parts belong to. Treat any listing advertising an "OSHA approved" valve or harness as a red flag.

Does a user seal check after a repair replace fit testing?

No. A seal check verifies you donned the respirator correctly that time; a fit test verifies the facepiece size and model actually fit your face, and OSHA requires it before first use and annually. After a repair, do both in order: seal check immediately, and keep the fit-test schedule running. The Respirator User Seal Check guide covers both pressure methods.

How often should 3M 6893 inhalation valves be replaced?

3M sets no calendar interval — the requirement is inspection before each use, with replacement whenever a valve is damaged, distorted or lost. The same inspect-then-replace logic applies to the exhalation valve and both gasket types; gaskets get checked at every cartridge change.

What is the 3M 6884 DIN port adapter for?

It is the alternate center-port configuration using a DIN thread connection, used only where the NIOSH approval configuration calls for it. An ordinary bayonet-cartridge 6700, 6800 or 6900 needs the standard 3M 6864 — buying DIN parts for a bayonet mask is the most common mis-order in this family.

Do 3M 6000 full-face parts fit the 3M FF-400 or FF-800 series?

Assume no unless 3M's documentation for the specific part says otherwise — the FF-400 (Ultimate FX) and FF-800 (Secure Click) have their own parts families, and the FF-800 does not even accept bayonet cartridges. The platform differences are covered in 3M Secure Click vs Bayonet Respirators and the 3M 6800 vs 3M 7800S comparison.

Where do I verify the NIOSH approval for a repaired 3M 6000 configuration?

On the NIOSH approval label supplied with the respirator and cartridges — the approval belongs to a complete configuration of facepiece plus air-cleaning components, which is why parts substitution voids it. The regulatory backdrop is summarized in OSHA 29 CFR 1910.134 Respiratory Protection Standard, and 3M's user instructions reproduce the approval tables for this platform.

Further reading on this site

• 3M 6000 Series Full Face Mask Respirator — the series collection these parts keep in service.
• 3M Full Face Respirators — the full 3M full-face lineup, 6000 through FF-800.
• 3M 6000 Series Full Face Respirator Review — the platform review behind this parts reference.
• 3M Filter Cartridge Guide — the consumables side: which cartridges and filters mount on these bayonets.
• 3M Respiratory Protection Complete Guide — the whole 3M respiratory silo in one map.
• Respirator Maintenance Inspection Storage — the program-level maintenance duties these part swaps live inside.
• 3M 6800 Vs Honeywell North 7600 — cross-brand comparison, whose parts list we cover in the Honeywell North 7600 replacement parts guide.

Full reference: Honeywell North 7600 Replacement Parts Guide — the same parts-desk treatment for the North silicone full facepiece.