The Register,air, cataloged under National Stock Number 4520-01-047-5970, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-047-5970 |
| Item Name | Register,air |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Fin Support Bar Spacing | 0.333 INCHES IN |
| Grille Fin Type | FIXED VERTICAL |
| Shape | RECTANGULAR |
| Frame Type | ANGLE |
| Fin Thickness | 0.035 INCHES IN |
| Frame Removability | NONREMOVABLE |
| Deflector Blade Operating Method | HAND-LEVER |
| Material | STEEL |
| Blade Vertical Surface Axis Position | HORIZONTAL |
| Grille Quantity | 26 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SD-1034 | D/9 Drawing number reference only Interpace Corp Hart and Cooley Div |
| 661 12BY6 | 5/9 Secondary reference Interpace Corp Hart and Cooley Div |
| 661 | 3/9 Design control — primary reference Interpace Corp Hart and Cooley Div |
NSN 4520-01-047-5970 is a Register,air, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-047-5970: Fin Support Bar Spacing: 0.333 INCHES IN; Grille Fin Type: FIXED VERTICAL; Shape: RECTANGULAR; Overall Length: 13.250 INCHES NOMINAL IN. 10 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.