The Register,air, cataloged under National Stock Number 4520-01-631-3522, 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 Hart & Cooley, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4520-01-631-3522 |
| Primary Part Number | 75007 |
| Item Name | Register,air |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Hart & Cooley, 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 |
|---|---|
| 75007 PRIMARY | Hart & Cooley, Inc. (USA) |
NSN 4520-01-631-3522 is a Register,air, manufactured by Hart & Cooley, Inc., classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-631-3522 has 1 manufacturer part number on file: 75007 (Hart & Cooley, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-648-3539. Verify interchangeability with system specifications before substitution.
Key specifications for 75007: Overall Height: 6.0 INCHES NOMINAL IN; Overall Length: 10.0 INCHES NOMINAL IN; Special Features: ALL STEEL CONSTRUCTION; VERTICAL ADJUSTABLE FACE BARS; HORIZONTAL MULTI-SHUTTER VALUE; BRIGHT WHITE FINISH; Part Name Assigned by Controlling Agency: SUPPLY REGISTER 10"(254.0MM) X 6"(152.4MM) MM. 0 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.