The Heater,duct Type,stationary, cataloged under National Stock Number 4520-01-421-0137, 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 Indeeco Llc Dba Indeeco. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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) |
| Manufacturers | Indeeco Llc Dba Indeeco (CAGE 74924) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-421-0137 |
| Primary Part Number | L21060:B12983-D-0EL77104TAG75 |
| Item Name | Heater,duct Type,stationary |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Indeeco Llc Dba Indeeco |
| 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 |
|---|---|
| L21060:B12983-D-0EL77104TAG75 | Indeeco Llc Dba Indeeco (USA) |
| Reference | Meaning |
|---|---|
| L210T0:B12983-D-TFZU-13.8-12X12- | 3/1 Design control — primary reference Indeeco Llc Dba Indeeco |
| L210T0:B12983-D -0 EL=77104 TAG | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| L210T0:B12983-D-0 | D/9 Drawing number reference only Indeeco Llc Dba Indeeco |
| TFZU-4.60-12-6-440/3/1/24 | C/1 Advisory reference — outside the item-of-supply concept Indeeco Llc Dba Indeeco |
NSN 4520-01-421-0137 is a Heater,duct Type,stationary, manufactured by Indeeco Llc Dba Indeeco, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-421-0137 has 1 manufacturer part number on file: L21060:B12983-D-0EL77104TAG75 (Indeeco Llc Dba Indeeco).
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.