The Spacer,compressor Rotor,aircraft, cataloged under National Stock Number 2840-01-159-9639, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-159-9639 |
| Primary Part Number | 661494 |
| Item Name | Spacer,compressor Rotor,aircraft |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Criticality Code Justification | AGAV |
| Outside Diameter | 19.335 INCHES MINIMUM AND 19.345 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 661494 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 661494 | 5/9 Secondary reference Mtu Aero Engine Components Inc |
| 661494 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 661494 | 5/9 Secondary reference Machine Products Co Inc |
| 661494 | C/1 Advisory reference — outside the item-of-supply concept Hanwha Aerospace Usa Llc |
NSN 2840-01-159-9639 is a Spacer,compressor Rotor,aircraft, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-01-159-9639 has 1 manufacturer part number on file: 661494 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 661494: Criticality Code Justification: AGAV; Overall Length: 2.293 INCHES MINIMUM AND 2.294 INCHES MAXIMUM IN; Outside Diameter: 19.335 INCHES MINIMUM AND 19.345 INCHES MAXIMUM IN; End Item Identification: ACFT ENG TF33. 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.
NSN 2840-01-159-9639 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.