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Technical Data Sheet
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280090-12 ITEM 61 — 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 SYNTHETIC OVERALL, center_hole_diameter: 0.792 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN, cross-sectional_shape_style: O-RING, criticality_code_justification: ZZZY. This part is cataloged in the Federal Logistics Information System under NSN 5331-00-551-8441, 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
280090-12 ITEM 61
NSN: 5331-00-551-8441
FSC: 5331 — O-RING
CAGE: 99657 — MAROTTA CONTROLS INC (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
center_hole_diameter0.792 INCHES MINIMUM AND 0.810 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
cross-sectional_shape_styleO-RING
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN5331-00-551-8441
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 280090-12 ITEM 61 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: 0.795 INCHES MINIMUM AND 0.807 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.926 INCHES MINIMUM AND 0.956 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CENTER HOLE DIAMETER0.795 INCHES MINIMUM AND 0.807 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
SPECIAL FEATURESACTION ID 45404101
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.926 INCHES MINIMUM AND 0.956 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
R49388-019GInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
028-09377InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2-019V0747-75InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
701152-018InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
018-7377InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
18,77X1,78-24B7InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 280090-12 ITEM 61?
280090-12 ITEM 61 is a O-RING.
What parts can replace 280090-12 ITEM 61?
There are 30 known substitutes for 280090-12 ITEM 61: R49388-019G, 028-09377, 2-019V0747-75 and 27 more. Substitute compatibility should be verified for your specific system.
Is 280090-12 ITEM 61 still available?
280090-12 ITEM 61 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