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721287 — 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 HOUSING,CONTROL is a the manufacturer industrial component. Key specifications include end_item_identification: AIRCRAFT MODEL S-3A A, general_characteristics_item_description: 2.750 IN. LG IN.

This part is cataloged in the Federal Logistics Information System under NSN 5330-00-954-7081, 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
721287
NSN: 5330-00-954-7081
FSC: 5330
CAGE: 78385 — MEGGITT TROY INC (USA)
SPECIFICATIONS
end_item_identificationAIRCRAFT MODEL S-3A A
general_characteristics_item_description2.750 IN. LG IN
NSN5330-00-954-7081
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 721287 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
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-25897,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM OVERALL
•
HARDNESS RATING: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: O-RING
•
CENTER HOLE DIAMETER: 1.284 INCHES MINIMUM AND 1.308 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-25897,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALRUBBER FLUOROCARBON CLASS FPM OVERALL
HARDNESS RATING70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM OVERALL
CROSS-SECTIONAL SHAPE STYLEO-RING
CENTER HOLE DIAMETER1.284 INCHES MINIMUM AND 1.308 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
903509C1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2-219V1226-75InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2-219 V747-75InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
06460P006017InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
2-219-77-545InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 721287?
721287 is a HOUSING,CONTROL.
What parts can replace 721287?
There are 5 known substitutes for 721287: 903509C1, 2-219V1226-75, 2-219 V747-75 and 2 more. Substitute compatibility should be verified for your specific system.
Is 721287 still available?
721287 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: October 2026