The Insulation Pipe Covering,thermal, cataloged under National Stock Number 1660-01-540-1355, 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 Tighitco Inc.. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-540-1355 |
| Primary Part Number | 36H26635-25 |
| Item Name | Insulation Pipe Covering,thermal |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Tighitco Inc. |
| Status | ACTIVE |
| Fitting Type Accommodated | ELBOW 45 DEG |
| 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 |
|---|---|
| 1128EC40160-25 | Northrop Grumman Systems Corporation (USA) |
| 36H26635-25 PRIMARY | Tighitco Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1128EC40160-25 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 1128EC40160 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 1660-01-540-1355 is a Insulation Pipe Covering,thermal, manufactured by Tighitco Inc., classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-540-1355 has 2 manufacturer part numbers on file: 1128EC40160-25 (Northrop Grumman Systems Corporation), 36H26635-25 (Tighitco Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 1660-01-540-1372, 1660-01-540-1412, 1660-01-540-1413. Verify interchangeability with system specifications before substitution.
Key specifications for 36H26635-25: Fitting Type Accommodated: ELBOW 45 DEG; Part Name Assigned by Controlling Agency: INAVY-INSULATION PIPE FIT; End Item Identification: EA-6B;INSULATION BLEED AIR AUXILIARY SYSTEM-STA 187.75-220. 1 specification is 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.