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Technical Data Sheet
PartsTable / COMPONENT / NA51661PC11
NA51661PC11 ✓ 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 RETAINER,PACKING 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 5330-00-398-5701, 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
NA51661PC11
NSN: 5330-00-398-5701
FSC: 5330
CAGE: 88032 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS WRIGHT ENGINEERED PUMP DIVISION USE CAGE CODE 0UBG9 FOR CATALOGING (USA)
SPECIFICATIONS
Part NumberNA51661PC11
NSN5330-00-398-5701
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NA51661PC11 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
4253050-1Interchangeable
interchangeable cross-reference
interchangeable
BT368Interchangeable
interchangeable cross-reference
interchangeable
705785Interchangeable
interchangeable cross-reference
interchangeable
463Interchangeable
interchangeable cross-reference
interchangeable
29-64187Interchangeable
interchangeable cross-reference
interchangeable
641878Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NA51661PC11?
NA51661PC11 is a RETAINER,PACKING.
What parts can replace NA51661PC11?
There are 20 known substitutes for NA51661PC11: 4253050-1, BT368, 705785 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NA51661PC11?
NA51661PC11 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-398-5701. 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