The Register,air, cataloged under National Stock Number 4520-01-672-6165, 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 Wittichen Supply Co. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-672-6165 |
| Primary Part Number | RHF45 40X22W |
| Item Name | Register,air |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Wittichen Supply Co |
| Status | ACTIVE |
| Material | ALUMINUM |
| 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 |
|---|---|
| RHF45 40X22W PRIMARY | Wittichen Supply Co (USA) |
| RHF45 40X22W | Hart & Cooley, Inc. (USA) |
NSN 4520-01-672-6165 is a Register,air, manufactured by Wittichen Supply Co, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-672-6165 has 2 manufacturer part numbers on file: RHF45 40X22W (Wittichen Supply Co), RHF45 40X22W (Hart & Cooley, Inc.).
Key specifications for RHF45 40X22W: Overall Length: 40.00 INCHES NOMINAL IN; Overall Width: 22.00 INCHES NOMINAL IN; Special Features: COLOR - WHITE; FIXED BLADES AT 45 DEGREES; Part Name Assigned by Controlling Agency: FILTER GRILLE. 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.