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21726-400 FIND 15 — Technical Data Sheet

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— · 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 FLUOROCARBON CLASS FPM, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 0.368 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, center_hole_diameter: 0.234 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System under NSN 5331-00-166-0969, 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
21726-400 FIND 15
NSN: 5331-00-166-0969
FSC: 5331 — O-RING
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter0.368 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
center_hole_diameter0.234 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
material_document_and_classificationAMS7280 ASSN STD SINGLE MATERIAL RESPONSE
NSN5331-00-166-0969
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21726-400 FIND 15 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
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
CENTER HOLE DIAMETER: 0.234 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS7280 ASSN STD SINGLE MATERIAL RESPONSE
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
OUTSIDE DIAMETER: 0.368 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
ELONGATION PERCENTAGE125 MAXIMUM
CENTER HOLE DIAMETER0.234 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS7280 ASSN STD SINGLE MATERIAL RESPONSE
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
OUTSIDE DIAMETER0.368 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 38
10117037InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AS3209-010InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A26-010InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
26-010InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A01-705InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2111-2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21726-400 FIND 15?
21726-400 FIND 15 is a O-RING.
What parts can replace 21726-400 FIND 15?
There are 38 known substitutes for 21726-400 FIND 15: 10117037, AS3209-010, A26-010 and 35 more. Substitute compatibility should be verified for your specific system.
Is 21726-400 FIND 15 still available?
21726-400 FIND 15 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: September 2026