The Cooler,lubricating Oil,engine, cataloged under National Stock Number 2935-00-121-6554, is classified within Federal Supply Class 2935 (Engine System Cooling Components, Aircraft Prime Moving) of the Engine Accessories group. The manufacturer of record is Boyd Niagara, Llc. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2935-00-121-6554 |
| Primary Part Number | 20038A |
| Item Name | Cooler,lubricating Oil,engine |
| FSC / FSG | 2935 / 29 — Engine System Cooling Components, Aircraft Prime Moving |
| Manufacturer | Boyd Niagara, Llc |
| Status | ACTIVE |
| Drain Plug Location | SIDE |
| Width | 5.630 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| L8534998 | Honeywell International Inc. (USA) |
| 20038A PRIMARY | Boyd Niagara, Llc (USA) |
| Reference | Meaning |
|---|---|
| 8534998 | 5/9 Secondary reference General Motors Corp Harrison Radiator Div |
| AV29350H58-001 | 5/2 Secondary reference U.S. Government activity |
NSN 2935-00-121-6554 is a Cooler,lubricating Oil,engine, manufactured by Boyd Niagara, Llc, classified under FSC 2935, Engine System Cooling Components, Aircraft Prime Moving. Status: active.
NSN 2935-00-121-6554 has 2 manufacturer part numbers on file: L8534998 (Honeywell International Inc.), 20038A (Boyd Niagara, Llc).
1 possible match (shared part number, not a government interchangeability claim): 2090-01-648-9933. Verify interchangeability with system specifications before substitution.
Key specifications for 20038A: Drain Plug Location: SIDE; Width: 5.630 INCHES NOMINAL IN. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.