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247971 — COVER,PROTECTIVE,DUST AND MOISTU

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

247971: COVER,PROTECTIVE,DUST AND MOISTU.

COVER,PROTECTIVE,DUST AND MOISTU. Key specifications include material: STEEL, end_item_identification: CRANE, open_end_inside_diameter: 20.420 INCHES NOMINAL IN, closed_end_overall_diameter: 21.640 INCHES MINIMUM AND 21.650 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-524-4798, 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
247971
NSN: 5340-01-524-4798
FSC: 5340 — Hardware, Commercial
CAGE: 60848 — ALLIED SYSTEMS COMPANY DBA ALLIED SYSTEMS CO (USA)
SPECIFICATIONS
materialSTEEL
special_featuresDIA OF BOLT CIRCLE IS 18.875 INCHES, NOMINAL;THERE ARE 20 0.688 INCH THRU BOLT HOLES;MFR NAME FOR ITEM IS "PLATE,SEAL" IN
end_item_identificationCRANE
open_end_inside_diameter20.420 INCHES NOMINAL IN
closed_end_overall_diameter21.640 INCHES MINIMUM AND 21.650 INCHES MAXIMUM IN
NSN5340-01-524-4798
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 247971 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
•
CLOSED END OVERALL DIAMETER: 21.640 INCHES MINIMUM AND 21.650 INCHES MAXIMUM IN
•
OPEN END INSIDE DIAMETER: 20.420 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
CLOSED END OVERALL DIAMETER21.640 INCHES MINIMUM AND 21.650 INCHES MAXIMUM IN
SPECIAL FEATURESDIA OF BOLT CIRCLE IS 18.875 INCHES, NOMINAL;THERE ARE 20 0.688 INCH THRU BOLT HOLES;MFR NAME FOR ITEM IS "PLATE,SEAL" IN
OPEN END INSIDE DIAMETER20.420 INCHES NOMINAL IN
END ITEM IDENTIFICATIONCRANE
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 1
P1731Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 247971?
247971 is a COVER,PROTECTIVE,DUST AND MOISTU.
What parts can replace 247971?
There is 1 known substitute for 247971: P1731. Substitute compatibility should be verified for your specific system.
What is the NSN for 247971?
247971 is cataloged in the U.S. Government catalog under NSN 5340-01-524-4798. 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.