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Technical Data Sheet
51668 ✓ 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 FILTER ELEMENT,FLUID is a the manufacturer industrial component. Key specifications include design_type: NONREUSABLE, body_diameter: 5.028 INCHES NOMINAL IN, special_features: FURNISHED W/GASKET AND O-RING, style_designator: CYLINDRICAL W/OUT CONTAINER, body_overall_length: 3.032 INCHES NOMINAL IN, body_inside_diameter: 2.938 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 5331-00-073-8158, 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
51668
NSN: 5331-00-073-8158
FSC: 5331 — O-RING
CAGE: 93835 — PARKER HANNIFIN CORPORATION DIV HYDRAULIC SYSTEMS DIVISION (USA)
SPECIFICATIONS
design_typeNONREUSABLE
body_diameter5.028 INCHES NOMINAL IN
special_featuresFURNISHED W/GASKET AND O-RING
style_designatorCYLINDRICAL W/OUT CONTAINER
body_overall_length3.032 INCHES NOMINAL IN
body_inside_diameter2.938 INCHES NOMINAL IN
filtering_media_designPLEATED SINGLE FILTERING MEDIA RESPONSE
media_for_which_designedFUEL/OIL, HYDROCARBON
NSN5331-00-073-8158
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 51668 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: 0.746 INCHES MINIMUM AND 0.764 INCHES MAXIMUM IN
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
CROSS-SECTIONAL HEIGHT: 0.093 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.746 INCHES MINIMUM AND 0.764 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
CROSS-SECTIONAL HEIGHT0.093 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
51668-02Interchangeable
interchangeable cross-reference
interchangeable
MA51668-02Interchangeable
interchangeable cross-reference
interchangeable
51668Interchangeable
interchangeable cross-reference
interchangeable
W1399AInterchangeable
interchangeable cross-reference
interchangeable
436FLInterchangeable
interchangeable cross-reference
interchangeable
5210PL0808370Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51668?
51668 is a FILTER ELEMENT,FLUID.
What parts can replace 51668?
There are 11 known substitutes for 51668: 51668-02, MA51668-02, 51668 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51668?
51668 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-073-8158. This indicates validated use in U.S. government and defense supply chains.
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