The Tube,pressure,no 1, cataloged under National Stock Number 2840-00-941-1040, 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 Dba Pratt & Whitney Div Pratt &whitney. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Tube,pressure,no 1 |
| FSC / FSG | 2840 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components (FSG 28) |
| Manufacturers | Rtx Corporation Div Pratt & Whitney (CAGE 52661); Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Kreisler Industrial Corporation (CAGE 05813) |
| Parameter | Value |
|---|---|
| NSN | 2840-00-941-1040 |
| Primary Part Number | 540820 |
| Item Name | Tube,pressure,no 1 |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 540820 | Rtx Corporation Div Pratt & Whitney (USA) |
| 540820 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 540820 | Kreisler Industrial Corporation (USA) |
| Reference | Meaning |
|---|---|
| 540820 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 2840-00-941-1040 is a Tube,pressure,no 1, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-00-941-1040 has 3 manufacturer part numbers on file: 540820 (Rtx Corporation Div Pratt & Whitney), 540820 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 540820 (Kreisler Industrial Corporation).
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.