The Plenum,chamber, cataloged under National Stock Number 4140-01-229-8820, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-229-8820 |
| Primary Part Number | 59-154776-1 |
| Item Name | Plenum,chamber |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY IAW QQ-A-250/8; 6.50 IN. W,6.35 IN. LG,4.97 IN. H IN |
| 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 |
|---|---|
| 59-154776-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 59-154776 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 4140-01-229-8820 is a Plenum,chamber, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-229-8820 has 1 manufacturer part number on file: 59-154776-1 (Northrop Grumman Systems Corporation).
Key specifications for 59-154776-1: General Characteristics Item Description: ALUMINUM ALLOY IAW QQ-A-250/8; 6.50 IN. W,6.35 IN. LG,4.97 IN. H IN; End Item Identification: 7025-01-161-9389 DATA MULTIPLEXER. 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.