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Technical Data Sheet
MS28774-027 ✓ 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 RETAINER,PACKING is a the manufacturer industrial component. Key specifications include cut_type: DIAGONAL OVERALL, material: PLASTIC TETRAFLUOROETHYLENE OVERALL, joint_type: SCARF-PERIPHERAL RETAINER, peripheral_diameter: 1.435 INCHES NOMINAL IN, center_hole_diameter: 1.328 INCHES MINIMUM AND 1.330 INCHES MAXIMUM IN, cross-sectional_height: 0.045 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-003-9271, 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
MS28774-027
NSN: 5330-00-003-9271
FSC: 5330
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
cut_typeDIAGONAL OVERALL
materialPLASTIC TETRAFLUOROETHYLENE OVERALL
joint_typeSCARF-PERIPHERAL RETAINER
peripheral_diameter1.435 INCHES NOMINAL IN
center_hole_diameter1.328 INCHES MINIMUM AND 1.330 INCHES MAXIMUM IN
cross-sectional_height0.045 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
cross-sectional_shape_styleSQUARE/RECTANGULAR
material_document_and_classificationSAE-AS8791 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-003-9271
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS28774-027 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
PERIPHERAL DIAMETER: 1.432 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR
CENTER HOLE DIAMETER: 1.328 INCHES MINIMUM AND 1.330 INCHES MAXIMUM IN
CUT TYPE: DIAGONAL OVERALL
CROSS-SECTIONAL HEIGHT: 0.045 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL
JOINT TYPE: SCARF-PERIPHERAL RETAINER
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER1.432 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR
CENTER HOLE DIAMETER1.328 INCHES MINIMUM AND 1.330 INCHES MAXIMUM IN
CUT TYPEDIAGONAL OVERALL
CROSS-SECTIONAL HEIGHT0.045 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
JOINT TYPESCARF-PERIPHERAL RETAINER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
AS8791Interchangeable
interchangeable cross-reference
interchangeable
MS28774Interchangeable
interchangeable cross-reference
interchangeable
MILR8791Interchangeable
interchangeable cross-reference
interchangeable
SAE-AS8791Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS28774-027?
MS28774-027 is a RETAINER,PACKING.
What parts can replace MS28774-027?
There are 4 known substitutes for MS28774-027: AS8791, MS28774, MILR8791 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS28774-027?
MS28774-027 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-003-9271. This indicates validated use in U.S. government and defense supply chains.
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