The Insulator, cataloged under National Stock Number 2840-00-040-3988, 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 General Motors Corp. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2840-00-040-3988 |
| Primary Part Number | 6731241 |
| Item Name | Insulator |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| 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 |
|---|---|
| 6731241 PRIMARY | General Motors Corp (USA) |
| BL563 | Johns Manville Intl (USA) |
| 6731241 | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| 33-21300 | 5/9 Secondary reference Tex-Tech Engineered Composites, Llc |
| 6731241 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| AC27-106 | 5/9 Secondary reference U.S. Government activity |
NSN 2840-00-040-3988 is a Insulator, manufactured by General Motors Corp, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-00-040-3988 has 3 manufacturer part numbers on file: 6731241 (General Motors Corp), BL563 (Johns Manville Intl), 6731241 (Rolls-Royce Corporation).
Key specifications for 6731241: End Item Identification: ENG T-56. 0 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.