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Technical Data Sheet
PartsTable / O-RING / 801-6640811 PC 221-3
801-6640811 PC 221-3 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, hardness_rating: 65.0 SHORE DUROMETER A MINIMUM AND 71.0 SHORE DUROMETER A MAXIMUM, outside_diameter: 6.219 INCHES MINIMUM AND 6.305 INCHES MAXIMUM IN, center_hole_diameter: 5.961 INCHES MINIMUM AND 6.007 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-114-9226, 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
801-6640811 PC 221-3
NSN: 5331-01-114-9226
FSC: 5331 — O-RING
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
hardness_rating65.0 SHORE DUROMETER A MINIMUM AND 71.0 SHORE DUROMETER A MAXIMUM
outside_diameter6.219 INCHES MINIMUM AND 6.305 INCHES MAXIMUM IN
center_hole_diameter5.961 INCHES MINIMUM AND 6.007 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
material_document_and_classificationMIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-01-114-9226
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 801-6640811 PC 221-3 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CENTER HOLE DIAMETER: 5.961 INCHES MINIMUM AND 6.007 INCHES MAXIMUM IN
•
HARDNESS RATING: 65.0 SHORE DUROMETER A MINIMUM AND 71.0 SHORE DUROMETER A MAXIMUM
•
OUTSIDE DIAMETER: 6.219 INCHES MINIMUM AND 6.305 INCHES MAXIMUM IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER5.961 INCHES MINIMUM AND 6.007 INCHES MAXIMUM IN
HARDNESS RATING65.0 SHORE DUROMETER A MINIMUM AND 71.0 SHORE DUROMETER A MAXIMUM
OUTSIDE DIAMETER6.219 INCHES MINIMUM AND 6.305 INCHES MAXIMUM IN
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
7338663Interchangeable
interchangeable cross-reference
interchangeable
3935FPC38SH1Interchangeable
interchangeable cross-reference
interchangeable
011588Interchangeable
interchangeable cross-reference
interchangeable
MS35319-568Interchangeable
interchangeable cross-reference
interchangeable
20425Interchangeable
interchangeable cross-reference
interchangeable
97-5109-14S2SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 801-6640811 PC 221-3?
801-6640811 PC 221-3 is a O-RING.
What parts can replace 801-6640811 PC 221-3?
There are 18 known substitutes for 801-6640811 PC 221-3: 7338663, 3935FPC38SH1, 011588 and 15 more. Substitute compatibility should be verified for your specific system.
Is 801-6640811 PC 221-3 still available?
801-6640811 PC 221-3 is currently cancelled.
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Last verified: July 2026