The Diaphragm,upper,control, cataloged under National Stock Number 1660-01-216-0513, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-01-216-0513 |
| Primary Part Number | 522881 |
| Item Name | Diaphragm,upper,control |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| FSC Application Data | CONTROL,DEFOG P/N748890-2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 522881 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| 522881 | Aerometals, Inc. (USA) |
| 522881 | Bellofram Corporation (USA) |
| Reference | Meaning |
|---|---|
| 522881 | 5/9 Secondary reference Tripri Co Inc |
| 522881 | 5/2 Secondary reference U.S. Government activity |
NSN 1660-01-216-0513 is a Diaphragm,upper,control, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-216-0513 has 3 manufacturer part numbers on file: 522881 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 522881 (Aerometals, Inc.), 522881 (Bellofram Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-673-7400. Verify interchangeability with system specifications before substitution.
Key specifications for 522881: FSC Application Data: CONTROL,DEFOG P/N748890-2; End Item Identification: T38,F5 ACFTS. 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.
NSN 1660-01-216-0513 has DEMIL Code Q. 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.