The Shield,heater Duct, cataloged under National Stock Number 2540-00-780-4553, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-00-780-4553 |
| Primary Part Number | 492640 |
| Item Name | Shield,heater Duct |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Material | NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 492640 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 492640 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 492640 | 5/9 Secondary reference Ssi Manufacturing Technologies Corp. Dba Ssi Manufacturing Technologies Corp |
| 492640 | 5/9 Secondary reference Cuda II, Inc Div Aerospace Products Company |
| 492640 | 5/9 Secondary reference Metal Masters Inc |
NSN 2540-00-780-4553 is a Shield,heater Duct, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-00-780-4553 has 2 manufacturer part numbers on file: 492640 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 492640 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 492640: Overall Height: 19.930 INCHES MINIMUM AND 19.950 INCHES MAXIMUM IN; Special Features: MATERIAL: NICKEL ALLOY, AMS 5536 SST; Part Name Assigned by Controlling Agency: PLATE-POSITIONING CUMBUSTION CHAMGER DUCT; Material: NICKEL ALLOY. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 2540-00-780-4553 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.