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4400591-1390 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4400591-1390: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include end_item_identification: MANIFOLD ASSY, criticality_code_justification: ZZZY, part_name_assigned_by_controlling_agency: O-RING, reference_number_differentiating_characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-235-4328, 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
4400591-1390
NSN: 5331-01-235-4328
NIINs: 012354328, 016568077
FSC: 5331 — O-ring
CAGE: 99657 — MAROTTA CONTROLS INC (USA)
SPECIFICATIONS
end_item_identificationMANIFOLD ASSY
criticality_code_justificationZZZY
part_name_assigned_by_controlling_agencyO-RING
reference_number_differentiating_characteristicsCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
NSN5331-01-235-4328
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4400591-1390 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: 0.103 INCHES NOMINAL IN
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
CENTER HOLE DIAMETER: 2.175 INCHES NOMINAL IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.103 INCHES NOMINAL IN
CRITICALITY CODE JUSTIFICATIONZZZY
CENTER HOLE DIAMETER2.175 INCHES NOMINAL IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
SUBSTITUTES & CROSS-REFERENCES 3
PL7499 ITEM 52Reference document
Same NSN cross-reference
Reference document — Secondary reference
4400591-1390CPReference document
Same NSN cross-reference
Reference document — Design control — primary reference
RE-012354328Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4400591-1390?
4400591-1390 is a O-RING.
What parts can replace 4400591-1390?
There are 3 known substitutes for 4400591-1390: PL7499 ITEM 52, 4400591-1390CP, RE-012354328. Substitute compatibility should be verified for your specific system.
What is the NSN for 4400591-1390?
4400591-1390 is cataloged in the U.S. Government catalog under NSN 5331-01-235-4328. 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.