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390-9053 — RETAINER,PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

390-9053: RETAINER,PACKING.

The RETAINER,PACKING is a the manufacturer industrial component. Key specifications include peripheral_diameter: 7.254 INCHES NOMINAL IN, center_hole_diameter: 6.248 INCHES NOMINAL IN, cross-sectional_height: 0.570 INCHES NOMINAL IN, end_item_identification: MRAP - UNIQUE NSN - MRAP NO PERMANENT WSDC IDENTIFIED. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-191-0529, 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
390-9053
NSN: 5330-01-191-0529
FSC: 5330 — Packing and Gasket Materials
CAGE: 26151 — STEMCO INC SUB OF COLTEC INDUSTRIES INC (USA)
SPECIFICATIONS
peripheral_diameter7.254 INCHES NOMINAL IN
center_hole_diameter6.248 INCHES NOMINAL IN
cross-sectional_height0.570 INCHES NOMINAL IN
end_item_identificationMRAP - UNIQUE NSN - MRAP NO PERMANENT WSDC IDENTIFIED
NSN5330-01-191-0529
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 390-9053 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: 0.570 INCHES NOMINAL IN
•
PERIPHERAL DIAMETER: 7.254 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 6.248 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.570 INCHES NOMINAL IN
PERIPHERAL DIAMETER7.254 INCHES NOMINAL IN
CENTER HOLE DIAMETER6.248 INCHES NOMINAL IN
END ITEM IDENTIFICATIONMRAP - UNIQUE NSN - MRAP NO PERMANENT WSDC IDENTIFIED
SUBSTITUTES & CROSS-REFERENCES 1
364-6404Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 390-9053?
390-9053 is a RETAINER,PACKING.
What parts can replace 390-9053?
There is 1 known substitute for 390-9053: 364-6404. Substitute compatibility should be verified for your specific system.
What is the NSN for 390-9053?
390-9053 is cataloged in the U.S. Government catalog under NSN 5330-01-191-0529. 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.