The Seal,turbine Engine, cataloged under National Stock Number 2840-01-021-5570, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 2840-01-021-5570 |
| Primary Part Number | 666790 |
| Item Name | Seal,turbine Engine |
| 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 |
| General Characteristics Item Description | GRAPHITIC CARBON,4.538 IN. IK,5.276 IN. OD,0.391 IN. THK,USED ON TF30 ENGINE 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 |
|---|---|
| 525487 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 666790 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 666789 | 5/1 Secondary reference Rtx Corporation Div Pratt & Whitney |
| 666790 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 525487 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 2840-01-021-5570 is a Seal,turbine Engine, 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 2840-01-021-5570 has 2 manufacturer part numbers on file: 525487 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 666790 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 666790: General Characteristics Item Description: GRAPHITIC CARBON,4.538 IN. IK,5.276 IN. OD,0.391 IN. THK,USED ON TF30 ENGINE IN. 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.
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.