The Insulation Pipe Covering,thermal, cataloged under National Stock Number 1660-01-107-4339, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1660-01-107-4339 |
| Primary Part Number | 128EC61236-1 |
| Item Name | Insulation Pipe Covering,thermal |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DM-2321 | Triangle Tool Co (USA) |
| 128EC61236-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 128EC61236-1 | Thermal Structures, Inc (USA) |
| Reference | Meaning |
|---|---|
| 128EC61236-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| DM-2321 | 5/9 Secondary reference Cobra Industries Inc |
NSN 1660-01-107-4339 is a Insulation Pipe Covering,thermal, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-107-4339 has 3 manufacturer part numbers on file: DM-2321 (Triangle Tool Co), 128EC61236-1 (Northrop Grumman Systems Corporation), 128EC61236-1 (Thermal Structures, Inc).
Key specifications for 128EC61236-1: Special Features: 4.500 IN.OUTSIDE DIA;TWO 0.410 IN.BY 0.130 IN.SLOTS;FUNCTIONAL DESCRIPTION:USED AS EQUIPMENT COOLING INSULATION FOR A DISCHARGE FAN; IN; End Item Identification: MOVABLE CANOPY,AIRCRAFT MODEL A-6E. 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.
NSN 1660-01-107-4339 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.