The Insulation Pipe Covering,thermal, cataloged under National Stock Number 1660-01-220-4756, 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 Defense. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Insulation Pipe Covering,thermal |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | Hi-Temp Insulation Inc Dba Hi-Temp Insulation Inc (CAGE 25167); Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc (CAGE 14711); Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (CAGE 76823); The Boeing Company Div Defense (CAGE 76301) |
| Parameter | Value |
|---|---|
| NSN | 1660-01-220-4756 |
| Primary Part Number | 74A835625-1129 |
| Item Name | Insulation Pipe Covering,thermal |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | The Boeing Company Div Defense |
| 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 |
|---|---|
| 74A835625-1129 | Hi-Temp Insulation Inc Dba Hi-Temp Insulation Inc (USA) |
| 74A835625-1129 | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc (USA) |
| 74A835625-1129 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 74A835625-1129 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10130492 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A835625-1095 | 5/9 Secondary reference Hi-Temp Insulation Inc Dba Hi-Temp Insulation Inc |
| 74A835625-1095 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 74A835625-1095 | 5/9 Secondary reference Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
| 74A835625-1095 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 1660-01-220-4756 is a Insulation Pipe Covering,thermal, manufactured by The Boeing Company Div Defense, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-220-4756 has 4 manufacturer part numbers on file: 74A835625-1129 (Hi-Temp Insulation Inc Dba Hi-Temp Insulation Inc), 74A835625-1129 (Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc), 74A835625-1129 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 74A835625-1129 (The Boeing Company Div Defense).
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.