The Door,air Register, cataloged under National Stock Number 4530-01-231-6693, is classified within Federal Supply Class 4530 (Fuel Burning Equipment Units) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Todd Combustion Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4530-01-231-6693 |
| Primary Part Number | D-05-01-0025 |
| Item Name | Door,air Register |
| FSC / FSG | 4530 / 45 — Fuel Burning Equipment Units |
| Manufacturer | Todd Combustion Inc |
| Status | ACTIVE |
| General Characteristics Item Description | CAST STEEL; 20.000 IN. OD IN |
| 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 |
|---|---|
| D-05-01-0025 PRIMARY | Todd Combustion Inc (USA) |
| Reference | Meaning |
|---|---|
| N-47501 SLT-1 P | C/1 Advisory reference — outside the item-of-supply concept Todd Combustion Inc |
| D-42101 PIECE 9 | 5/9 Secondary reference Todd Combustion Inc |
| D-5-1-25 | 5/9 Secondary reference Todd Combustion Inc |
| N-47501 SHT-I PC10 | C/1 Advisory reference — outside the item-of-supply concept Todd Combustion Inc |
NSN 4530-01-231-6693 is a Door,air Register, manufactured by Todd Combustion Inc, classified under FSC 4530, Fuel Burning Equipment Units. Status: active.
NSN 4530-01-231-6693 has 1 manufacturer part number on file: D-05-01-0025 (Todd Combustion Inc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-246-3907. Verify interchangeability with system specifications before substitution.
Key specifications for D-05-01-0025: General Characteristics Item Description: CAST STEEL; 20.000 IN. OD IN. 1 specification is 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.