The Register,air, cataloged under National Stock Number 4520-01-651-6337, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-651-6337 |
| Primary Part Number | RCV-0-SV-09-09-30-0-0-0-00-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-09-09-30-0-0-0-00-AP PRIMARY | Leonhardt Company Inc (USA) |
| Reference | Meaning |
|---|---|
| 512-8543688-F92 | 5/9 Secondary reference Naval Sea Systems Command |
| 380811 | D/9 Drawing number reference only Tuttle and Bailey Div Allied Thermal Corp |
| G643-9256-F93 | 5/9 Secondary reference U.S. Government activity |
| 512-8543688-F93 | 5/9 Secondary reference Naval Sea Systems Command |
| G643-9256-F92 | 5/9 Secondary reference U.S. Government activity |
NSN 4520-01-651-6337 is a Register,air, manufactured by Leonhardt Company Inc, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-651-6337 has 1 manufacturer part number on file: RCV-0-SV-09-09-30-0-0-0-00-AP (Leonhardt Company Inc).
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.