PartsTable TECHNICAL DATA SHEET
NSN 2815-00-340-7033Government record, cited

Ring, Piston2815-00-340-7033

NSN 2815-00-340-7033 · NIIN 003407033 · Part number M1904U
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic · FSC 2815 — Diesel Engines and Components · FSG 28 — Engines, Turbines, and Components · CAGE 61208
Government record, cited
NSN 2815-00-340-7033 — this item is cataloged by the U.S. Government under National Stock Number 2815-00-340-7033. Manufacturer of record part number: M1904U.
Also searched as  2815-00-340-7033 · 2815003407033 · NIIN 003407033 · 00-340-7033 · FSC 2815 Diesel Engines and Components · CAGE 61208 · M1904U · D32034 · 1341403C1
Nearby stock numbers  ·
Features
  • Ring,piston — FSC 2815
  • Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE
  • Joint Style: INTERLOCKING JOINT
  • Oil Passage Type and Quantity: 6 HOLE VERTICALLY THROUGH RING
  • Radial Wall Thickness: 0.1270 INCHES NOMINAL IN
  • Ring Style: CONCENTRIC
  • Standard Bore Diameter: 3.625 INCHES IN
  • Material: STEEL OVERALL
Identification
  • NSN: 2815-00-340-7033
  • NIIN: 003407033
  • FSC: 2815 — Diesel Engines and Components
  • FSG: 28 — Engines, Turbines, and Components
  • Primary part number: M1904U
  • Manufacturer: Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
General Description

The Ring,piston, cataloged under National Stock Number 2815-00-340-7033, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2815-00-340-7033
Primary Part NumberM1904U
Item NameRing,piston
FSC / FSG2815 / 28 — Diesel Engines and Components
ManufacturerTwin Disc, Incorporated Dba Twin Disc Mid-Atlantic
StatusACTIVE
Cross-Sectional Shape StylePLAIN RECTANGULAR, STRAIGHT FACE
Joint StyleINTERLOCKING JOINT
Oil Passage Type and Quantity6 HOLE VERTICALLY THROUGH RING
Radial Wall Thickness0.1270 INCHES NOMINAL IN
Ring StyleCONCENTRIC
Standard Bore Diameter3.625 INCHES IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
M1904U PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
1341403C1 Cnh Industrial America Llc Dba Cnh America (USA)
Reference documents
ReferenceMeaning
D32034 5/9 Secondary reference
Cnh Industrial America Llc Dba Cnh America
No interchangeability data on file.
Other items in FSC 2815 — Diesel Engines and Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2815-00-011-9099
2815-00-011-9099 · Item name not on file
2815-00-017-1875
PIN
2815-00-024-4185
2815-00-024-4185 · Item name not on file
2815-00-033-1482
2815-00-033-1482 · Item name not on file
2815-00-036-5350
2815-00-036-5350 · Item name not on file
2815-00-179-7630
TUBE
2815-00-346-4639
STRAINER ASSY
2815-00-592-5308
RING,PISTON

Frequently Asked Questions

What is NSN 2815-00-340-7033?

NSN 2815-00-340-7033 is a Ring,piston, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 2815, Diesel Engines and Components. Status: active.

What part numbers are listed for NSN 2815-00-340-7033?

NSN 2815-00-340-7033 has 2 manufacturer part numbers on file: M1904U (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), 1341403C1 (Cnh Industrial America Llc Dba Cnh America).

What are the specifications of M1904U?

Key specifications for M1904U: Overall Width: 0.0940 INCHES NOMINAL IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Joint Style: INTERLOCKING JOINT; Oil Passage Type and Quantity: 6 HOLE VERTICALLY THROUGH RING. 7 specifications are documented in the U.S. Government catalog.

Is NSN 2815-00-340-7033 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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