The Shroud,compressor,aircraft Gas T, cataloged under National Stock Number 2840-00-345-3657, 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. Government technical data includes 1 specification, 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. 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 | 2840-00-345-3657 |
| Primary Part Number | 4040645 |
| Item Name | Shroud,compressor,aircraft Gas T |
| 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 |
| Criticality Code Justification | FEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 4040645 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 2840-00-345-3657 is a Shroud,compressor,aircraft Gas T, 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 2840-00-345-3657 has 1 manufacturer part number on file: 4040645 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 2840-01-474-6880. Verify interchangeability with system specifications before substitution.
Key specifications for 4040645: Criticality Code Justification: FEAT; Overall Length: 1.391 INCHES MINIMUM AND 1.405 INCHES MAXIMUM IN; Special Features: USED ON THE 5TH STAGE DISK AND BLADES, CASE AND STATORS; T.O. 2J-F100-24, FIG 144, IND 39; P/N 4035493, 4035494 AND 4035495 ARE SERVICE FIXES FOR P/N 4040645; Part Name Assigned by Controlling Agency: ORIGINAL NAME SHROUD SEGMENT,TURBINE,AIRCRAFT GAS TURBINE ENGINE. 1 specification is 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 2840-00-345-3657 has DEMIL Code D. 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.