The Heater,water,gas, cataloged under National Stock Number 4520-01-668-2087, 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 Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-668-2087 |
| Primary Part Number | H4-0001-040 OXYGEN CLEANCP |
| Item Name | Heater,water,gas |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| H4-0001-040 OXYGEN CLEANCP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| H4-0001-040 OXYGEN CLEAN | 3/1 Design control — primary reference Thermax, Inc. |
NSN 4520-01-668-2087 is a Heater,water,gas, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-668-2087 has 1 manufacturer part number on file: H4-0001-040 OXYGEN CLEANCP (Naval Inventory Control Point Mechanicsburg).
Key specifications for H4-0001-040 OXYGEN CLEANCP: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: CARTRIDGE,HEATER; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. 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.