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Technical Data Sheet
PartsTable / O-RING / 7866-221
7866-221 ✓ 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: PLASTIC POLYTETRAFLUOROETHYLENE, temp_rating: -65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF, hardness_rating: 60.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.699 INCHES NOMINAL IN, center_hole_diameter: 1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN, cross-sectional_height: 0.139 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-298-6197, 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
7866-221
NSN: 5331-00-298-6197
FSC: 5331 — O-RING
CAGE: 25184 — PARKER HANNIFIN CORPORATION DIV O-RING DIVISION (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE
temp_rating-65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
hardness_rating60.0 SHORE DUROMETER A NOMINAL
outside_diameter1.699 INCHES NOMINAL IN
center_hole_diameter1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
cross-sectional_height0.139 INCHES NOMINAL IN
NSN5331-00-298-6197
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7866-221 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
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE
•
OUTSIDE DIAMETER: 1.699 INCHES NOMINAL IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.139 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
•
HARDNESS RATING: 60.0 SHORE DUROMETER A NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE
OUTSIDE DIAMETER1.699 INCHES NOMINAL IN
TEMP RATING-65.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.139 INCHES NOMINAL IN
CENTER HOLE DIAMETER1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
HARDNESS RATING60.0 SHORE DUROMETER A NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
21302Interchangeable
interchangeable cross-reference
interchangeable
51Interchangeable
interchangeable cross-reference
interchangeable
207190Interchangeable
interchangeable cross-reference
interchangeable
450314Interchangeable
interchangeable cross-reference
interchangeable
50S0BInterchangeable
interchangeable cross-reference
interchangeable
14-985BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7866-221?
7866-221 is a O-RING.
What parts can replace 7866-221?
There are 18 known substitutes for 7866-221: 21302, 51, 207190 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7866-221?
7866-221 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-298-6197. 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