The Boss,diffuser Duct,turbine Engin, cataloged under National Stock Number 2840-00-998-8683, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-00-998-8683 |
| Primary Part Number | 577629 |
| Item Name | Boss,diffuser Duct,turbine Engin |
| 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 |
| FSC Application Data | AIRCRAFT JET ENGINE,TF30 |
| General Characteristics Item Description | COBALT ALLOY,AMS 5382,0.690 IN. LG,2.100 IN. FLANGE OD,0.780 IN. BODY OD,0.569 IN. ID,0.065 IN. FLANGE THK,0.080 IN. BODY MATERIAL THK 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 |
|---|---|
| 577629 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 577629 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 2840-00-998-8683 is a Boss,diffuser Duct,turbine Engin, 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 2840-00-998-8683 has 1 manufacturer part number on file: 577629 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 577629: FSC Application Data: AIRCRAFT JET ENGINE,TF30; General Characteristics Item Description: COBALT ALLOY,AMS 5382,0.690 IN. LG,2.100 IN. FLANGE OD,0.780 IN. BODY OD,0.569 IN. ID,0.065 IN. FLANGE THK,0.080 IN. BODY MATERIAL THK IN. 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.
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.