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M1904EA — RING,PISTON

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

M1904EA: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include material: IRON OVERALL, radial_wall_thickness: 0.1380 INCHES NOMINAL IN, end_item_identification: TWIN DISC INC. MARINE TRANSMISSION, MODEL MG5091.

This part is cataloged in the U.S. Government catalog under NSN 3040-01-444-5054, 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
M1904EA
NSN: 3040-01-444-5054
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialIRON OVERALL
radial_wall_thickness0.1380 INCHES NOMINAL IN
end_item_identificationTWIN DISC INC. MARINE TRANSMISSION, MODEL MG5091
NSN3040-01-444-5054
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,PISTON TITLE COMPONENT PN M1904EA MFR RING,PISTON
KEY FEATURES
•
RADIAL WALL THICKNESS: 0.1380 INCHES NOMINAL IN
•
MATERIAL: IRON OVERALL
TECHNICAL CHARACTERISTICS
RADIAL WALL THICKNESS0.1380 INCHES NOMINAL IN
END ITEM IDENTIFICATIONTWIN DISC INC. MARINE TRANSMISSION, MODEL MG5091
MATERIALIRON OVERALL
OTHER ITEMS IN FSC 3040 — Miscellaneous Power Transmission Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3040-00-001-0046 3040-00-001-0047 3040-00-001-0048 3040-00-001-0068 3040-00-001-0077 3040-00-001-0078 3040-00-001-0089 3040-00-001-1224
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M1904EA?
M1904EA is a RING,PISTON.
What is the NSN for M1904EA?
M1904EA is cataloged in the U.S. Government catalog under NSN 3040-01-444-5054. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.