PartsTable
Technical Data Sheet
MS28778-2 ✓ 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 SYNTHETIC, temp_rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF, hardness_rating: 90.0 SHORE DUROMETER A NOMINAL, peripheral_diameter: 0.367 INCHES NOMINAL IN, center_hole_diameter: 0.234 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN, elongation_percentage: 80 MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-803-7208, 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
MS28778-2
NSN: 5331-00-803-7208
FSC: 5331 — O-RING
CAGE: A0311 — TECNO TRADE S.R.L. (ITA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
temp_rating-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
hardness_rating90.0 SHORE DUROMETER A NOMINAL
peripheral_diameter0.367 INCHES NOMINAL IN
center_hole_diameter0.234 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN
elongation_percentage80 MAXIMUM
cross-sectional_height0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
reference_number_differentiating_characteristicsAS MODIFIED BY MATERIAL
NSN5331-00-803-7208
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS28778-2 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
22512Interchangeable
interchangeable cross-reference
interchangeable
D62Interchangeable
interchangeable cross-reference
interchangeable
88604Interchangeable
interchangeable cross-reference
interchangeable
S16042AInterchangeable
interchangeable cross-reference
interchangeable
D-602Interchangeable
interchangeable cross-reference
interchangeable
B94.19 TABLE 41Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS28778-2?
MS28778-2 is a O-RING.
What parts can replace MS28778-2?
There are 23 known substitutes for MS28778-2: 22512, D62, 88604 and 20 more. Substitute compatibility should be verified for your specific system.
Is MS28778-2 still available?
MS28778-2 is currently cancelled.
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