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Technical Data Sheet
PartsTable / MRO / A1804-3
A1804-3 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 SEAL ASSY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301, construction: ONE-PIECE, outside_diameter: 0.406 INCHES NOMINAL IN, special_features: 0.064 IN. W BY 0.040 IN.

DEEP KEYWAY ON ID IN, style_designator: CIRCULAR, aperture_diameter: 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5365-00-102-2818, 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→ A1804-3
NSN: 5365-00-102-2818
FSC: 5365
CAGE: 98889 — AEROCONTROLEX GROUP, INC. DIV TALLEY ACTUATORS (USA)
SPECIFICATIONS
materialSTEEL COMP 301
constructionONE-PIECE
outside_diameter0.406 INCHES NOMINAL IN
special_features0.064 IN. W BY 0.040 IN. DEEP KEYWAY ON ID IN
style_designatorCIRCULAR
aperture_diameter0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-5059,1/2H MIL SPEC SINGLE MATERIAL RESPONSE
NSN5365-00-102-2818
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SEAL ASSY TITLE COMPONENT PN A1804-3 MFR SEAL ASSY
KEY FEATURES
•
OUTSIDE DIAMETER: 0.406 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059,1/2H MIL SPEC SINGLE MATERIAL RESPONSE
•
STYLE DESIGNATOR: CIRCULAR
•
APERTURE DIAMETER: 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
CONSTRUCTION: ONE-PIECE
•
MATERIAL: STEEL COMP 301
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.406 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059,1/2H MIL SPEC SINGLE MATERIAL RESPONSE
STYLE DESIGNATORCIRCULAR
APERTURE DIAMETER0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
CONSTRUCTIONONE-PIECE
MATERIALSTEEL COMP 301
SPECIAL FEATURES0.064 IN. W BY 0.040 IN. DEEP KEYWAY ON ID IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
18043Interchangeable
interchangeable cross-reference
interchangeable
150 43Interchangeable
interchangeable cross-reference
interchangeable
2012-T 43Interchangeable
interchangeable cross-reference
interchangeable
1340Interchangeable
interchangeable cross-reference
interchangeable
A18043Interchangeable
interchangeable cross-reference
interchangeable
91242832Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A1804-3?
A1804-3 is a SEAL ASSY. It is classified as a MRO (MRO_GENERAL).
What parts can replace A1804-3?
There are 12 known substitutes for A1804-3: 18043, 150 43, 2012-T 43 and 9 more. Substitute compatibility should be verified for your specific system.
Is A1804-3 still available?
A1804-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026