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Technical Data Sheet
2-21261 ✓ 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

LINER,EXHAUST DUCT,AIRCRAFT GAS. Key specifications include shape: STRAIGHT, material: STEEL CORROSION RESISTING AND PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, special_features: C/O PASSIVE ASPIRATOR; 20 GAGE; HEMOSTATIC ERASER; USED IN TREATING RETINAL BLEEDING, features_provided: STERILE, disposition_after_initial_use: DISPOSABLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-220-6148, 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
2-21261
NSN: 5331-01-220-6148
FSC: 5331 — O-RING
CAGE: 77873 — ROCKFORD POWERTRAIN INC DIV POWERTRAIN ROCKFORD, INC. (USA)
SPECIFICATIONS
shapeSTRAIGHT
materialSTEEL CORROSION RESISTING AND PLASTIC POLYTETRAFLUOROETHYLENE OVERALL
special_featuresC/O PASSIVE ASPIRATOR; 20 GAGE; HEMOSTATIC ERASER; USED IN TREATING RETINAL BLEEDING
features_providedSTERILE
disposition_after_initial_useDISPOSABLE
NSN5331-01-220-6148
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2-21261 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
CENTER HOLE DIAMETER: 5.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER5.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
221261Interchangeable
interchangeable cross-reference
interchangeable
21261Interchangeable
interchangeable cross-reference
interchangeable
4321261Interchangeable
interchangeable cross-reference
interchangeable
93-12-17-30-LTInterchangeable
interchangeable cross-reference
interchangeable
A93L009Interchangeable
interchangeable cross-reference
interchangeable
2AT287Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2-21261?
2-21261 is a LINER,EXHAUST DUCT,AIRCRAFT GAS.
What parts can replace 2-21261?
There are 7 known substitutes for 2-21261: 221261, 21261, 4321261 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2-21261?
2-21261 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-220-6148. This indicates validated use in U.S. government and defense supply chains.
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