The Seal,turbine Air Sealing Ring, cataloged under National Stock Number 2840-01-034-5808, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-034-5808 |
| Primary Part Number | 4042381 |
| Item Name | Seal,turbine Air Sealing Ring |
| 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 | COBALT ALLOY,AMS 5537;1.060 IN. MIN 1.080 IN. MAX LG,1.040 IN. MIN 1.060 IN. MAX W,0.022 IN. MIN 0.025 IN. MAX 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 |
|---|---|
| 4042381 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 4042381 | 5/9 Secondary reference Paradigm Manchester Inc. Dba Pursuit Aerospace |
| 4042381 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 2840-01-034-5808 is a Seal,turbine Air Sealing Ring, 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 2840-01-034-5808 has 1 manufacturer part number on file: 4042381 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4042381: General Characteristics Item Description: COBALT ALLOY,AMS 5537;1.060 IN. MIN 1.080 IN. MAX LG,1.040 IN. MIN 1.060 IN. MAX W,0.022 IN. MIN 0.025 IN. MAX THK IN; End Item Identification: ACFT ENG F100-PW-100. 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.