The Connector, cataloged under National Stock Number 4520-01-144-0337, 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 American Turbo Systems Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Connector |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | American Turbo Systems Inc (CAGE 0WE82) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-144-0337 |
| Primary Part Number | 100864-1 |
| Item Name | Connector |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | American Turbo Systems Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 100864-1 PRIMARY | American Turbo Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 100864-1 | 5/9 Secondary reference Walker Power Systems, Inc. Dba Tiernay Turbines |
NSN 4520-01-144-0337 is a Connector, manufactured by American Turbo Systems Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-144-0337 has 1 manufacturer part number on file: 100864-1 (American Turbo Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 6210-01-502-7072. 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.