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5489325 ITEM 1 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5489325 ITEM 1: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: GLASS FIBER, design_type: FRICTION, overall_diameter: 27.250 INCHES NOMINAL IN, inside_diameter_length: 26.560 INCHES NOMINAL IN, end_item_identification: INDEP FAIR ASSY PERISCOPE NO 1, round_cap_outside_surface_condition: SMOOTH. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-325-5697, 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
5489325 ITEM 1
NSN: 5340-01-325-5697
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialGLASS FIBER
design_typeFRICTION
overall_diameter27.250 INCHES NOMINAL IN
inside_diameter_length26.560 INCHES NOMINAL IN
end_item_identificationINDEP FAIR ASSY PERISCOPE NO 1
round_cap_outside_surface_conditionSMOOTH
reference_number_differentiating_characteristicsQUALITY ASSURANCE TESTED FOR SURFFACE OR SUBMARINE APPLICATION
NSN5340-01-325-5697
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5489325 ITEM 1 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 27.250 INCHES NOMINAL IN
•
MATERIAL: GLASS FIBER
•
INSIDE DIAMETER LENGTH: 26.560 INCHES NOMINAL IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: QUALITY ASSURANCE TESTED FOR SURFFACE OR SUBMARINE APPLICATION
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER27.250 INCHES NOMINAL IN
END ITEM IDENTIFICATIONINDEP FAIR ASSY PERISCOPE NO 1
MATERIALGLASS FIBER
INSIDE DIAMETER LENGTH26.560 INCHES NOMINAL IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSQUALITY ASSURANCE TESTED FOR SURFFACE OR SUBMARINE APPLICATION
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 3
F8810701QASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5489325 ITEM 1QASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
F8810701Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5489325 ITEM 1?
5489325 ITEM 1 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 5489325 ITEM 1?
There are 3 known substitutes for 5489325 ITEM 1: F8810701QA, 5489325 ITEM 1QA, F8810701. Substitute compatibility should be verified for your specific system.
What is the NSN for 5489325 ITEM 1?
5489325 ITEM 1 is cataloged in the U.S. Government catalog under NSN 5340-01-325-5697. 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.