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Technical Data Sheet
MS28778-10 ✓ 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 BUTADIENE-ACRYLONITRILE CLASS NBR, temp_rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF, hardness_rating: 88.0 SHORE DUROMETER A NOMINAL, peripheral_diameter: 0.938 INCHES MINIMUM AND 0.960 INCHES MAXIMUM IN, center_hole_diameter: 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, elongation_percentage: 80 MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-079-0216, 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
MS28778-10
NSN: 5331-00-079-0216
FSC: 5331 — O-RING
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
hardness_rating88.0 SHORE DUROMETER A NOMINAL
peripheral_diameter0.938 INCHES MINIMUM AND 0.960 INCHES MAXIMUM IN
center_hole_diameter0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
elongation_percentage80 MAXIMUM
cross-sectional_height0.094 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
departure_from_cited_documentAS MODIFIED BY SHELF LIFE
criticality_code_justificationZZZW
material_document_and_classificationMIL-P-5510 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-00-079-0216
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS28778-10 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: 80 MAXIMUM
MATERIAL: RUBBER SYNTHETIC
CRITICALITY CODE JUSTIFICATION: FEAT
TEMP RATING: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
PERIPHERAL DIAMETER: 0.949 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT: 0.094 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
ELONGATION PERCENTAGE80 MAXIMUM
SPECIAL FEATURESCLEANING,PACKAGING AND MARKING IAW MIL-STD-1330D
PART NAME ASSIGNED BY CONTROLLING AGENCYO-RING
MATERIALRUBBER SYNTHETIC
CRITICALITY CODE JUSTIFICATIONFEAT
TEMP RATING-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
PERIPHERAL DIAMETER0.949 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.094 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
HARDNESS RATING90.0 SHORE DUROMETER A NOMINAL
CENTER HOLE DIAMETER0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MS28778-10Interchangeable
interchangeable cross-reference
interchangeable
I15624PD832-9Interchangeable
interchangeable cross-reference
interchangeable
2251-10Interchangeable
interchangeable cross-reference
interchangeable
803-6915566-2.1 3Interchangeable
interchangeable cross-reference
interchangeable
9672M09P10Interchangeable
interchangeable cross-reference
interchangeable
MS28775-910Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS28778-10?
MS28778-10 is a O-RING.
What parts can replace MS28778-10?
There are 19 known substitutes for MS28778-10: MS28778-10, I15624PD832-9, 2251-10 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS28778-10?
MS28778-10 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-079-0216. This indicates validated use in U.S. government and defense supply chains.
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