The Retainer,clutch, cataloged under National Stock Number 1660-00-103-3545, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-00-103-3545 |
| Item Name | Retainer,clutch |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,2.250 IN. OD,0.250 IN THK,1-9/16-18 NEF-3B THREADS,USED ONP/N 5348660 CLUTCH ASSEMBLY IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2348551 | 5/9 Secondary reference The Boeing Company |
| 2348551 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-103-3545 is a Retainer,clutch, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5940-01-216-5204. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-00-103-3545: General Characteristics Item Description: STEEL,2.250 IN. OD,0.250 IN THK,1-9/16-18 NEF-3B THREADS,USED ONP/N 5348660 CLUTCH ASSEMBLY IN. 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 1660-00-103-3545 has DEMIL Code B. 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.