The Bubble, cataloged under National Stock Number 4520-01-084-6758, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-084-6758 |
| Item Name | Bubble |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| FSC Application Data | HEATER,TRAILER MOUNTED HDU-13M |
| General Characteristics Item Description | MATERIAL CURVED PLASTIC,3 HOLES,SIZE 0.219 IN. DIA. EQUALLY SPACED,O/D 3.250 IN.,I/D 2.625 IN. IN |
| 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 |
|---|---|
| 74188 | 5/9 Secondary reference Drs Environmental Systems Inc |
| 74188 | 3/9 Design control — primary reference U.S. Government activity |
| 74188 | 5/2 Secondary reference U.S. Government activity |
NSN 4520-01-084-6758 is a Bubble, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-084-6758: FSC Application Data: HEATER,TRAILER MOUNTED HDU-13M; General Characteristics Item Description: MATERIAL CURVED PLASTIC,3 HOLES,SIZE 0.219 IN. DIA. EQUALLY SPACED,O/D 3.250 IN.,I/D 2.625 IN. IN. 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.