The Seal,air,aircraft Gas Turbine En, cataloged under National Stock Number 2840-01-345-4787, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-345-4787 |
| Item Name | Seal,air,aircraft Gas Turbine En |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Status | ACTIVE |
| Surface Treatment Document and Classification | EMS52499 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | AGAV |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Diameter | 2.035 INCHES MINIMUM AND 2.040 INCHES MAXIMUM IN |
| Engine Section Location | TURBINE |
| Surface Treatment | TUNGSTEN OVERALL |
| Material | STEEL COMP 440C OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 3090824-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2840-01-345-4787 is a Seal,air,aircraft Gas Turbine En, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
Key specifications for 2840-01-345-4787: Surface Treatment Document and Classification: EMS52499 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL; Criticality Code Justification: AGAV; Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 8 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.