The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-01-497-5556, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-497-5556 |
| Primary Part Number | 247128-94 |
| Item Name | Pipe,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Cross-Sectional Width | 20.000 INCHES NOMINAL IN |
| Shape | RECTANGULAR |
| Cross-Sectional Length | 43.110 INCHES NOMINAL 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 |
|---|---|
| 247128-94 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 247128-94 | 3/9 Design control — primary reference Litton Systems Inc. Div Navigation Systems Division |
NSN 4520-01-497-5556 is a Pipe,air Conditioning-Heating, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-497-5556 has 1 manufacturer part number on file: 247128-94 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
Key specifications for 247128-94: Cross-Sectional Width: 20.000 INCHES NOMINAL IN; Shape: RECTANGULAR; Cross-Sectional Length: 43.110 INCHES NOMINAL IN; Special Features: BEFORE BONDING PREPARE SURFACE PER 893002;PAINT SURFACE INDICATED PER 893321 TYPE II;BOND PER 893105 TYPE II USING FN 15;INSTALL PER MIL-R-47196;CHEM FILM PER MIL-C-5541,CLASS 3;WORKMANSHIP PER 171020 AND MIL-STD-545,REQT 9. 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.