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Technical Data Sheet
PartsTable / O-RING / D-26451 PIECE 3
D-26451 PIECE 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, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, center_hole_diameter: 17.385 INCHES MINIMUM AND 17.405 INCHES MAXIMUM IN, elongation_percentage: 160 MAXIMUM, cross-sectional_height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-892-1943, 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
D-26451 PIECE 3
NSN: 5331-00-892-1943
FSC: 5331 — O-RING
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialRUBBER
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
center_hole_diameter17.385 INCHES MINIMUM AND 17.405 INCHES MAXIMUM IN
elongation_percentage160 MAXIMUM
cross-sectional_height0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
NSN5331-00-892-1943
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D-26451 PIECE 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: 17.385 INCHES MINIMUM AND 17.405 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 160 MAXIMUM
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER17.385 INCHES MINIMUM AND 17.405 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
ELONGATION PERCENTAGE160 MAXIMUM
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
MATERIALRUBBER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
820-4-50001-79Interchangeable
interchangeable cross-reference
interchangeable
MILG21610Interchangeable
interchangeable cross-reference
interchangeable
820-4-80002-524Interchangeable
interchangeable cross-reference
interchangeable
820-4-80002PC525Interchangeable
interchangeable cross-reference
interchangeable
820-4-80002-525Interchangeable
interchangeable cross-reference
interchangeable
75G8R6012Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D-26451 PIECE 3?
D-26451 PIECE 3 is a O-RING.
What parts can replace D-26451 PIECE 3?
There are 22 known substitutes for D-26451 PIECE 3: 820-4-50001-79, MILG21610, 820-4-80002-524 and 19 more. Substitute compatibility should be verified for your specific system.
Is D-26451 PIECE 3 still available?
D-26451 PIECE 3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026