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Technical Data Sheet
PartsTable / O-RING / 571/D
571/D ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The 571/D is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-523-6445, 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
571/D
NSN: 5331-01-523-6445
FSC: 5331 — O-RING
CAGE: 62351 — APPLE RUBBER PRODUCTS, INC. DBA APPLE RUBBER PRODUCTS INC (USA)
SPECIFICATIONS
Part Number571/D
NSN5331-01-523-6445
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 571/D 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
•
COLOR: RED
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONNHA 1600515-X AND 4101441-50X
SPECIAL FEATURES0.063 W 70 BUNA N RED TFE COATING W
COLORRED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
81411Interchangeable
interchangeable cross-reference
interchangeable
81411-00Interchangeable
interchangeable cross-reference
interchangeable
8215K4Interchangeable
interchangeable cross-reference
interchangeable
MS25102-6Interchangeable
interchangeable cross-reference
interchangeable
1011D1Interchangeable
interchangeable cross-reference
interchangeable
5D1RInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 571/D?
571/D is a 571/D.
What parts can replace 571/D?
There are 10 known substitutes for 571/D: 81411, 81411-00, 8215K4 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 571/D?
571/D is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-523-6445. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026