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MS28774-328 — RETAINER,PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS28774-328: RETAINER,PACKING.

The RETAINER,PACKING is a the manufacturer industrial component. Key specifications include cut_type: DIAGONAL OVERALL, material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, peripheral_diameter: 2.251 INCHES MINIMUM AND 2.257 INCHES MAXIMUM IN, center_hole_diameter: 1.887 INCHES MINIMUM AND 1.889 INCHES MAXIMUM IN, cross-sectional_height: 0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN, cross-sectional_shape_style: SQUARE/RECTANGULAR. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-618-6282, 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
MS28774-328
NSN: 5330-00-618-6282
NIINs: 006186282, 013961191
FSC: 5330 — Packing and Gasket Materials
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
cut_typeDIAGONAL OVERALL
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
peripheral_diameter2.251 INCHES MINIMUM AND 2.257 INCHES MAXIMUM IN
center_hole_diameter1.887 INCHES MINIMUM AND 1.889 INCHES MAXIMUM IN
cross-sectional_height0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
cross-sectional_shape_styleSQUARE/RECTANGULAR
departure_from_cited_documentCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
criticality_code_justificationZZZW
material_document_and_classificationSAE-AS8791 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-618-6282
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS28774-328 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: 0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE-AS8791 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR
•
CUT TYPE: DIAGONAL OVERALL
•
PERIPHERAL DIAMETER: 2.252 INCHES MINIMUM AND 2.256 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 1.887 INCHES MINIMUM AND 1.889 INCHES MAXIMUM IN
•
MATERIAL: PLASTIC TETRAFLUOROETHYLENE OVERALL
•
JOINT TYPE: SCARF-PERIPHERAL RETAINER
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE-AS8791 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR
CUT TYPEDIAGONAL OVERALL
PERIPHERAL DIAMETER2.252 INCHES MINIMUM AND 2.256 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.887 INCHES MINIMUM AND 1.889 INCHES MAXIMUM IN
MATERIALPLASTIC TETRAFLUOROETHYLENE OVERALL
JOINT TYPESCARF-PERIPHERAL RETAINER
SUBSTITUTES & CROSS-REFERENCES 4
6406593-MTPD-A19Reference document
Same NSN cross-reference
Reference document — Secondary reference
6406593-MTPD-B19Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS28774Reference document
Same NSN cross-reference
Reference document — Identification reference
SAE-AS8791Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS28774-328?
MS28774-328 is a RETAINER,PACKING.
What parts can replace MS28774-328?
There are 4 known substitutes for MS28774-328: 6406593-MTPD-A19, 6406593-MTPD-B19, MS28774 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS28774-328?
MS28774-328 is cataloged in the U.S. Government catalog under NSN 5330-00-618-6282. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.