The Heater,duct Type,stationary, cataloged under National Stock Number 4520-01-421-0140, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Heater,duct Type,stationary |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-421-0140 |
| Item Name | Heater,duct Type,stationary |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| 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 |
| Reference | Meaning |
|---|---|
| L210T0 B12983-D-TFZU-1.1-12X6-4- | 3/1 Design control — primary reference Indeeco Llc Dba Indeeco |
| TFZU-1.10-12-6-440/1/1/24-RH | C/1 Advisory reference — outside the item-of-supply concept Indeeco Llc Dba Indeeco |
| L210T0 B12983-D-0 | D/9 Drawing number reference only Indeeco Llc Dba Indeeco |
| L210T0:B12983-D -0 EL-77096 TAG | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4520-01-421-0140 is a Heater,duct Type,stationary, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
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.