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PartsTable / COMPONENT / 21218-9
21218-9 ✓ 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 SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416, end_item_identification: SEAWOLF CLASS (SSN), material_document_and_classification: ASTM 582 ASSN STD SINGLE MATERIAL RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-01-417-4978, 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
21218-9
NSN: 3040-01-417-4978
FSC: 3040
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 416
end_item_identificationSEAWOLF CLASS (SSN)
material_document_and_classificationASTM 582 ASSN STD SINGLE MATERIAL RESPONSE
NSN3040-01-417-4978
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT,SHOULDERED TITLE COMPONENT PN 21218-9 MFR SHAFT,SHOULDERED
KEY FEATURES
•
MATERIAL: STEEL COMP 416
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM 582 ASSN STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 416
MATERIAL DOCUMENT AND CLASSIFICATIONASTM 582 ASSN STD SINGLE MATERIAL RESPONSE
END ITEM IDENTIFICATIONSEAWOLF CLASS (SSN)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
21218Interchangeable
interchangeable cross-reference
interchangeable
500038Interchangeable
interchangeable cross-reference
interchangeable
708206Interchangeable
interchangeable cross-reference
interchangeable
21351Interchangeable
interchangeable cross-reference
interchangeable
50A4412Interchangeable
interchangeable cross-reference
interchangeable
15486-1THRU27Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21218-9?
21218-9 is a SHAFT,SHOULDERED.
What parts can replace 21218-9?
There are 14 known substitutes for 21218-9: 21218, 500038, 708206 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21218-9?
21218-9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-01-417-4978. 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