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M1904AQ — RING,PISTON

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

M1904AQ: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include material: IRON OVERALL, ring_style: CONCENTRIC, joint_style: INTERLOCKING JOINT, overall_width: 0.0925 INCHES MINIMUM AND 0.0935 INCHES MAXIMUM IN, surface_treatment: TIN OVERALL, radial_wall_thickness: 0.0940 INCHES MINIMUM AND 0.1040 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 2805-00-147-8651, 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
M1904AQ
NSN: 2805-00-147-8651
FSC: 2805 — Gasoline Reciprocating Engines, Except Aircraft; and Components
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialIRON OVERALL
ring_styleCONCENTRIC
joint_styleINTERLOCKING JOINT
overall_width0.0925 INCHES MINIMUM AND 0.0935 INCHES MAXIMUM IN
surface_treatmentTIN OVERALL
radial_wall_thickness0.0940 INCHES MINIMUM AND 0.1040 INCHES MAXIMUM IN
standard_bore_diameter2.250 INCHES IN
cross-sectional_shape_stylePLAIN RECTANGULAR, STRAIGHT FACE
NSN2805-00-147-8651
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,PISTON TITLE COMPONENT PN M1904AQ MFR RING,PISTON
KEY FEATURES
•
CROSS-SECTIONAL SHAPE STYLE: PLAIN RECTANGULAR, STRAIGHT FACE
•
JOINT STYLE: INTERLOCKING JOINT
•
RADIAL WALL THICKNESS: 0.0940 INCHES MINIMUM AND 0.1040 INCHES MAXIMUM IN
•
RING STYLE: CONCENTRIC
•
SURFACE TREATMENT: TIN OVERALL
•
STANDARD BORE DIAMETER: 2.250 INCHES IN
•
MATERIAL: IRON OVERALL
TECHNICAL CHARACTERISTICS
OVERALL WIDTH0.0925 INCHES MINIMUM AND 0.0935 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEPLAIN RECTANGULAR, STRAIGHT FACE
JOINT STYLEINTERLOCKING JOINT
RADIAL WALL THICKNESS0.0940 INCHES MINIMUM AND 0.1040 INCHES MAXIMUM IN
RING STYLECONCENTRIC
SURFACE TREATMENTTIN OVERALL
STANDARD BORE DIAMETER2.250 INCHES IN
MATERIALIRON OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
M1904AA TO 1904AZReference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 M1904AQ?
M1904AQ is a RING,PISTON.
What parts can replace M1904AQ?
There is 1 known substitute for M1904AQ: M1904AA TO 1904AZ. Substitute compatibility should be verified for your specific system.
What is the NSN for M1904AQ?
M1904AQ is cataloged in the U.S. Government catalog under NSN 2805-00-147-8651. 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.