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C4551 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The CYLINDER,RELAY is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_diameter: 0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 2.375 INCHES NOMINAL IN, overall_length: 3.125 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, outside_corner_radius: 0.375 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 2825-00-390-4165, 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
C4551
NSN: 2825-00-390-4165
FSC: 2825
CAGE: 59560 — TERRY CORP OF CONNECTICUT SUB OF INGERSOLL-RAND CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width2.375 INCHES NOMINAL IN
overall_length3.125 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
bolt_hole_quantity4
outside_corner_radius0.375 INCHES NOMINAL IN
end_item_identificationSTEAM TURBINE,SHIPS PROPULSION SYSTEM
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleRECTANGULAR METAL
outside_edge_to_bolt_hole_center_distance_along_width0.437 INCHES NOMINAL IN
outside_edge_to_bolt_hole_center_distance_along_length0.437 INCHES NOMINAL IN
NSN2825-00-390-4165
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CYLINDER,RELAY TITLE COMPONENT PN C4551 MFR CYLINDER,RELAY
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONSTEAM TURBINE,SHIPS PROPULSION SYSTEM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
648695Interchangeable
interchangeable cross-reference
interchangeable
C455-1Interchangeable
interchangeable cross-reference
interchangeable
BA3957Interchangeable
interchangeable cross-reference
interchangeable
30402Interchangeable
interchangeable cross-reference
interchangeable
3418AS6424Interchangeable
interchangeable cross-reference
interchangeable
E2876PC177Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C4551?
C4551 is a CYLINDER,RELAY.
What parts can replace C4551?
There are 7 known substitutes for C4551: 648695, C455-1, BA3957 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C4551?
C4551 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2825-00-390-4165. 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