The Cover Insulating,coupling, cataloged under National Stock Number 1660-01-050-0016, 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 Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-050-0016 |
| Primary Part Number | 1T-5678-2 |
| Item Name | Cover Insulating,coupling |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc |
| Status | ACTIVE |
| FSC Application Data | ACFT AIR CONDITIONING SYSTEM |
| General Characteristics Item Description | MATL P1000-1 OR EQUIV,3.900 IN. LG,3.000 IN. W,2.500 IN. D,1 HOLE 2.000 IN. ID,SPLIT LINE ONE SIDE FULL LG OF DEPTH IN |
| Reference Data and Literature | T.O. 1F16A4-21 |
| 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 |
|---|---|
| C7888-2 | Aero Space Composites Llc Dba Aerospace Composites (USA) |
| 1T-5678-2 PRIMARY | Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc (USA) |
| 713229-2 | Arrowhead Products Corp (USA) |
| 55A009-2 | Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites (USA) |
| 700-018-2 | Kirkhill, Inc. Dba Ta Aerospace Co Div Kirkhill Inc, Sfs Division (USA) |
| Reference | Meaning |
|---|---|
| C7888-2 | 7/2 Vendor item drawing reference U.S. Government activity |
| 55A009-2 | 5/9 Secondary reference Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
| 1660PL0661162 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 600-215-2 | 5/9 Secondary reference Burke Industries Purosil Div |
NSN 1660-01-050-0016 is a Cover Insulating,coupling, manufactured by Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-050-0016 has 5 manufacturer part numbers on file: C7888-2 (Aero Space Composites Llc Dba Aerospace Composites), 1T-5678-2 (Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc), 713229-2 (Arrowhead Products Corp), 55A009-2 (Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites), 700-018-2 (Kirkhill, Inc. Dba Ta Aerospace Co Div Kirkhill Inc, Sfs Division).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-428-5884. Verify interchangeability with system specifications before substitution.
Key specifications for 1T-5678-2: FSC Application Data: ACFT AIR CONDITIONING SYSTEM; General Characteristics Item Description: MATL P1000-1 OR EQUIV,3.900 IN. LG,3.000 IN. W,2.500 IN. D,1 HOLE 2.000 IN. ID,SPLIT LINE ONE SIDE FULL LG OF DEPTH IN; Reference Data and Literature: T.O. 1F16A4-21; End Item Identification: ACFT F16. 3 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.