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Technical Data Sheet
26521 ✓ Verified by PartsTable
Cellularline · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The VALVE,FLOAT,AIRCRAFT FUEL TANK is a Cellularline industrial component. Key specifications include color: NATURAL, width: 0.375 INCHES IN, length: 3.312 INCHES IN, material: RUBBER SYNTHETIC OVERALL, thickness: 0.010 INCHES IN, body_style: FLANGE MOUNT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-084-1230, 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
MRO MRO_GENERAL 26521
NSN: 5330-00-084-1230
FSC: 5330
CAGE: 09344 — ROCKWELL COLLINS, INC. DBA RC DISPLAYS SYSTEMS (USA)
SPECIFICATIONS
colorNATURAL
width0.375 INCHES IN
length3.312 INCHES IN
materialRUBBER SYNTHETIC OVERALL
thickness0.010 INCHES IN
body_styleFLANGE MOUNT
head_styleMUSHROOM
shell_typeSOLID
stem_styleGROOVED
head_height0.1719 INCHES NOMINAL IN
neck_radius0.2187 INCHES NOMINAL IN
stem_length3.7969 INCHES NOMINAL IN
NSN5330-00-084-1230
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 26521 MFR: Cellularline ⚠ 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
APERTURE DIAMETER: 7.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-3065,SC5155 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL THICKNESS: 0.162 INCHES NOMINAL IN
STYLE DESIGNATOR: CIRCULAR
MATERIAL: RUBBER CHLOROPRENE CLASS CR OVERALL
HARDNESS RATING: 45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM OVERALL
OUTSIDE DIAMETER: 7.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE DIAMETER7.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-3065,SC5155 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL THICKNESS0.162 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
MATERIALRUBBER CHLOROPRENE CLASS CR OVERALL
HARDNESS RATING45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM OVERALL
OUTSIDE DIAMETER7.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
1292500Interchangeable
interchangeable cross-reference
interchangeable
A975SInterchangeable
interchangeable cross-reference
interchangeable
7343081Interchangeable
interchangeable cross-reference
interchangeable
2-652-1Interchangeable
interchangeable cross-reference
interchangeable
815-1853067SYM2652-1Interchangeable
interchangeable cross-reference
interchangeable
2652.1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26521?
26521 is a VALVE,FLOAT,AIRCRAFT FUEL TANK manufactured by Cellularline. It is classified as a MRO (MRO_GENERAL).
What parts can replace 26521?
There are 13 known substitutes for 26521: 1292500, A975S, 7343081 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26521?
26521 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-084-1230. This indicates validated use in U.S. government and defense supply chains.
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