The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-01-527-9863, 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 General Dynamics Mission Systems, Inc.. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4520-01-527-9863 |
| Primary Part Number | 1259162-1 |
| Item Name | Pipe,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | General Dynamics Mission Systems, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 1259162-1 PRIMARY | General Dynamics Mission Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1259054-6 | 5/9 Secondary reference General Dynamics Mission Systems, Inc. |
| 1259054 | D/9 Drawing number reference only General Dynamics Mission Systems, Inc. |
NSN 4520-01-527-9863 is a Pipe,air Conditioning-Heating, manufactured by General Dynamics Mission Systems, Inc., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-527-9863 has 1 manufacturer part number on file: 1259162-1 (General Dynamics Mission Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-527-9866. Verify interchangeability with system specifications before substitution.
Key specifications for 1259162-1: End Item Identification: PETROLEUM QUALITY ANALYSIS SYSTEM. 0 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.