The Plenum Assy-Obiggs, cataloged under National Stock Number 1660-01-519-3378, 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 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-01-519-3378 |
| Item Name | Plenum Assy-Obiggs |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Overall Diameter | 5.000 INCHES NOMINAL IN |
| Material | ALUMINUM |
| 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 |
| Reference | Meaning |
|---|---|
| 17P2N9170-1 | 3/2 Design control — primary reference U.S. Government activity |
| 17P2N9170 | D/9 Drawing number reference only U.S. Government activity |
NSN 1660-01-519-3378 is a Plenum Assy-Obiggs, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1660-01-519-3383. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-01-519-3378: Overall Diameter: 5.000 INCHES NOMINAL IN; Overall Length: 42.280 INCHES NOMINAL IN; Special Features: NHA 17P2N9007; Part Name Assigned by Controlling Agency: PLENUM ASSY-OBIGGS 1.1. 2 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.
NSN 1660-01-519-3378 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.