The Register,air, cataloged under National Stock Number 4520-01-651-6325, 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 Leonhardt Company Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Register,air |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Leonhardt Company Inc (CAGE 3BRK0); Tuttle and Bailey Div Allied Thermal Corp (CAGE 7E417) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-651-6325 |
| Primary Part Number | RCV-0-SV-06-06-30-0-0-0-00-AP |
| Item Name | Register,air |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Leonhardt Company Inc |
| 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 |
|---|---|
| RCV-0-SV-06-06-30-0-0-0-00-AP PRIMARY | Leonhardt Company Inc (USA) |
| RCV-0-SV-06-06-30-0-0-0-00-AP PRIMARY | Tuttle and Bailey Div Allied Thermal Corp (USA) |
| Reference | Meaning |
|---|---|
| G643-9256-F64 | 5/9 Secondary reference U.S. Government activity |
| 218087766 | 5/9 Secondary reference U.S. Government activity |
| 512-8543688-F64 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 4520-01-651-6325 is a Register,air, manufactured by Leonhardt Company Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-651-6325 has 2 manufacturer part numbers on file: RCV-0-SV-06-06-30-0-0-0-00-AP (Leonhardt Company Inc), RCV-0-SV-06-06-30-0-0-0-00-AP (Tuttle and Bailey Div Allied Thermal Corp).
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.