The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-00-540-0309, 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 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-540-0309 |
| Primary Part Number | 505-0734-003 |
| Item Name | Pipe,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| Length | 4.781 INCHES NOMINAL IN |
| Cross-Sectional Width | 4.438 INCHES NOMINAL IN |
| Shape | RECTANGULAR |
| Cross-Sectional Length | 5.000 INCHES NOMINAL IN |
| Construction | SINGLE |
| Material | ALUMINUM ALLOY |
| Material Thickness | 0.0299 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 |
|---|---|
| 505-0734-003 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
NSN 4520-00-540-0309 is a Pipe,air Conditioning-Heating, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-540-0309 has 1 manufacturer part number on file: 505-0734-003 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).
Key specifications for 505-0734-003: Length: 4.781 INCHES NOMINAL IN; Cross-Sectional Width: 4.438 INCHES NOMINAL IN; Shape: RECTANGULAR; Cross-Sectional Length: 5.000 INCHES NOMINAL IN. 7 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.