The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-01-536-7371, 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 The Boeing Company Div Defense. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-536-7371 |
| Primary Part Number | 74A830975-2003 |
| Item Name | Pipe,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Length | 3.250 INCHES NOMINAL IN |
| Shape | ROUND |
| Cross-Sectional Diameter | 0.079 INCHES NOMINAL IN |
| Material Thickness | 0.0300 INCHES 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 |
|---|---|
| 74A830975-2003 | Associated Aircraft Manufacturing & Sales, Inc. Dba Associated Aircraft Manufacturing & Sales Inc (USA) |
| 74A830975-2003 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 4520-01-536-7371 is a Pipe,air Conditioning-Heating, manufactured by The Boeing Company Div Defense, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-536-7371 has 2 manufacturer part numbers on file: 74A830975-2003 (Associated Aircraft Manufacturing & Sales, Inc. Dba Associated Aircraft Manufacturing & Sales Inc), 74A830975-2003 (The Boeing Company Div Defense).
Key specifications for 74A830975-2003: Length: 3.250 INCHES NOMINAL IN; Shape: ROUND; Special Features: WOVEN FIBERGLASS,CLOTH REINFORCED,SILICON RUBBER; Part Name Assigned by Controlling Agency: DUCT-T/R COLLING AIR,LH EQPT BAY. 4 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.