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421477 ✓ 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 PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include outside_diameter: 3.625 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 3.250 INCHES NOMINAL IN, cross-sectional_thickness: 0.025 INCHES NOMINAL IN, cross-sectional_shape_style: RECTANGULAR METAL, material_document_and_classification: QQ-C-576 SOFT ANNEALED FED SPEC ALL MATERIAL RESPONSES OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-015-9616, 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
421477
NSN: 5330-01-015-9616
FSC: 5330
CAGE: 91816 — CIRCOR AEROSPACE, INC. DBA CIRCOR AEROSPACE INC (USA)
SPECIFICATIONS
outside_diameter3.625 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter3.250 INCHES NOMINAL IN
cross-sectional_thickness0.025 INCHES NOMINAL IN
cross-sectional_shape_styleRECTANGULAR METAL
material_document_and_classificationQQ-C-576 SOFT ANNEALED FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5330-01-015-9616
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 421477 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
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESCROSS-SECTIONAL SHAPE STYLE:116 IRREGULAR SHAPE FROM OLD FIIG A03200
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
BX-9337-1Interchangeable
interchangeable cross-reference
interchangeable
4467Interchangeable
interchangeable cross-reference
interchangeable
42-1459Interchangeable
interchangeable cross-reference
interchangeable
3290217 PIECE 11Interchangeable
interchangeable cross-reference
interchangeable
55493 PIECE 11Interchangeable
interchangeable cross-reference
interchangeable
421477Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 421477?
421477 is a PACKING,PREFORMED.
What parts can replace 421477?
There are 8 known substitutes for 421477: BX-9337-1, 4467, 42-1459 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 421477?
421477 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-015-9616. 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