The Pipe,air Conditioning-Heating, cataloged under National Stock Number 4520-01-508-5410, 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 Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Pipe,air Conditioning-Heating |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Mcmaster-Carr Supply Co (CAGE 39428); Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp (CAGE 65777); Ovc-Engineered Solutions Llc (CAGE 3H7B5) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-508-5410 |
| Primary Part Number | 47012266-1 |
| Item Name | Pipe,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp |
| 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 |
|---|---|
| 1766K11 | Mcmaster-Carr Supply Co (USA) |
| 47012266-1 PRIMARY | Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp (USA) |
| 47012266-1 PRIMARY | Ovc-Engineered Solutions Llc (USA) |
| Reference | Meaning |
|---|---|
| 47012266 | 5/9 Secondary reference Ovc-Engineered Solutions Llc |
NSN 4520-01-508-5410 is a Pipe,air Conditioning-Heating, manufactured by Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-508-5410 has 3 manufacturer part numbers on file: 1766K11 (Mcmaster-Carr Supply Co), 47012266-1 (Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp), 47012266-1 (Ovc-Engineered Solutions Llc).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-668-9196. Verify interchangeability with system specifications before substitution.
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.