The Insulation Pipe Covering,thermal, cataloged under National Stock Number 1660-01-326-3446, 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 The Boeing Company Div Legacy Am&m. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1660-01-326-3446 |
| Primary Part Number | LD364-0001-0001 |
| Item Name | Insulation Pipe Covering,thermal |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Material Density | 3.0 POUNDS PER CUBIC FOOT NOMINAL LBS |
| Nominal Fitting Size Accommodated | 0.380 INCHES IN |
| Insulation Thickness | 0.250 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Layer Quantity | 1 |
| Material | PLASTIC LOCATION NOT OTHERWISE SPECIFIED |
| Fabrication Method | MOLDED |
| Flammability Rating | NOT RATED |
| 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 |
|---|---|
| LD364-0001-0001 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| LD364-0001-0001 | Hi-Temp Insulation Inc Dba Hi-Temp Insulation Inc (USA) |
| Reference | Meaning |
|---|---|
| LD364-0001-0001 | 5/2 Secondary reference U.S. Government activity |
NSN 1660-01-326-3446 is a Insulation Pipe Covering,thermal, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-326-3446 has 2 manufacturer part numbers on file: LD364-0001-0001 (The Boeing Company Div Legacy Am&m), LD364-0001-0001 (Hi-Temp Insulation Inc Dba Hi-Temp Insulation Inc).
Key specifications for LD364-0001-0001: Material Density: 3.0 POUNDS PER CUBIC FOOT NOMINAL LBS; Nominal Fitting Size Accommodated: 0.380 INCHES IN; Insulation Thickness: 0.250 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN; Layer Quantity: 1. 7 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.