PartsTable
Technical Data Sheet
21061 FN 6 ✓ 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

RETAINER,HELICAL COMPRESSION SPR. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-562-9538, 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
21061 FN 6
NSN: 5340-01-562-9538
FSC: 5340
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
Part Number21061 FN 6
NSN5340-01-562-9538
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21061 FN 6 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 24
PER40Interchangeable
interchangeable cross-reference
interchangeable
5578052Interchangeable
interchangeable cross-reference
interchangeable
35-866340Q03Interchangeable
interchangeable cross-reference
interchangeable
5016-030Interchangeable
interchangeable cross-reference
interchangeable
F79-500Interchangeable
interchangeable cross-reference
interchangeable
5016-030MIDLAND SCIENTIFIC INC.Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21061 FN 6?
21061 FN 6 is a RETAINER,HELICAL COMPRESSION SPR.
What parts can replace 21061 FN 6?
There are 24 known substitutes for 21061 FN 6: PER40, 5578052, 35-866340Q03 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21061 FN 6?
21061 FN 6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-562-9538. This indicates validated use in U.S. government and defense supply chains.
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