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78321 ✓ 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 CLUTCH ASSEMBLY,FRICTION is a the manufacturer industrial component. Key specifications include overall_length: 1.125 INCHES NOMINAL IN, overall_diameter: 2.215 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-230-4460, 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
78321
NSN: 5330-00-230-4460
FSC: 5330
CAGE: 97370 — SPX FLOW US, LLC DBA SPX VALVES & CONTROLS (USA)
SPECIFICATIONS
overall_length1.125 INCHES NOMINAL IN
overall_diameter2.215 INCHES NOMINAL IN
special_featuresSTEEL;CENTRIFUGAL TYPE;INCLUDES HUB;4 SHOES AND RETURN SPRINGS;TAPERED:MINOR DIA 0.455 IN.,MAJOR DIA 0.625 IN.;2-1/4 IN. NOM CLUTCH SIZE IN
NSN5330-00-230-4460
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 78321 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
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
•
CRITICALITY CODE JUSTIFICATION: ZZZY
TECHNICAL CHARACTERISTICS (FLIS)
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
CRITICALITY CODE JUSTIFICATIONZZZY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
26513Interchangeable
interchangeable cross-reference
interchangeable
78321Interchangeable
interchangeable cross-reference
interchangeable
54308Interchangeable
interchangeable cross-reference
interchangeable
820-4551352PC 48Interchangeable
Same NIIN cross-reference
interchangeable
820-4551181-3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 78321?
78321 is a CLUTCH ASSEMBLY,FRICTION.
What parts can replace 78321?
There are 5 known substitutes for 78321: 26513, 78321, 54308 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 78321?
78321 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-230-4460. 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