The Pipe,exhaust, cataloged under National Stock Number 4520-01-726-4604, 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 Harco Manufacturing Company Div Harco Manufacturing Company Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-726-4604 |
| Primary Part Number | 540038A |
| Item Name | Pipe,exhaust |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Harco Manufacturing Company Div Harco Manufacturing Company Inc |
| Status | ACTIVE |
| Nominal Overall Length | 36.00 INCHES IN |
| Nominal Outside Diameter | 3.5 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 |
|---|---|
| 540038A PRIMARY | Harco Manufacturing Company Div Harco Manufacturing Company Inc (USA) |
| Reference | Meaning |
|---|---|
| 11B5091726 | 7/2 Vendor item drawing reference Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army |
NSN 4520-01-726-4604 is a Pipe,exhaust, manufactured by Harco Manufacturing Company Div Harco Manufacturing Company Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-726-4604 has 1 manufacturer part number on file: 540038A (Harco Manufacturing Company Div Harco Manufacturing Company Inc).
Key specifications for 540038A: Nominal Overall Length: 36.00 INCHES IN; Nominal Outside Diameter: 3.5 INCHES IN; Special Features: MATERIAL IS ALUMINIZED STEEL; Part Name Assigned by Controlling Agency: PIPE,EXAUST. 2 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.