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PartsTable / COMPONENT / R91A
R91A ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

CARTRIDGE,RESPIRATOR,AIR FILTERI. Key specifications include hazard_protection_feature: ORGANIC VAPORS, criticality_code_justification: FEAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4240-01-245-3328, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
R91A
NSN: 4240-01-245-3328
FSC: 4240
CAGE: 63984 — SQUARE D CO MONROE PLANT (USA)
SPECIFICATIONS
special_featuresUSED ON AMERICAN OPTICAL MODELS R/S4000,R/S5000,R/S6000 AND R/S7000 RESPIRATORS; NIOSH APPROVAL NO. TC-23C-490/491; SOLE SOURCE REQUIRED BY STATUTE 6.302
hazard_protection_featureORGANIC VAPORS
criticality_code_justificationFEAT
NSN4240-01-245-3328
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CARTRIDGE,RESPIRATOR,AIR FILTERI TITLE COMPONENT PN R91A MFR CARTRIDGE,RESPIRATOR,A
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
HAZARD PROTECTION FEATURE: ORGANIC VAPORS
TECHNICAL CHARACTERISTICS (FLIS)
CRITICALITY CODE JUSTIFICATIONFEAT
HAZARD PROTECTION FEATUREORGANIC VAPORS
SPECIAL FEATURESUSED ON AMERICAN OPTICAL MODELS R/S4000,R/S5000,R/S6000 AND R/S7000 RESPIRATORS; NIOSH APPROVAL NO. TC-23C-490/491; SOLE SOURCE REQUIRED BY STATUTE 6.302
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
27343Interchangeable
interchangeable cross-reference
interchangeable
R51Interchangeable
interchangeable cross-reference
interchangeable
510Interchangeable
interchangeable cross-reference
interchangeable
SCB69326-19Interchangeable
interchangeable cross-reference
interchangeable
51136Interchangeable
interchangeable cross-reference
interchangeable
1136Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R91A?
R91A is a CARTRIDGE,RESPIRATOR,AIR FILTERI.
What parts can replace R91A?
There are 8 known substitutes for R91A: 27343, R51, 510 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R91A?
R91A is cataloged in the Federal Logistics Information System (FLIS) under NSN 4240-01-245-3328. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026