The Register,air, cataloged under National Stock Number 4520-01-406-2297, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 10 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-406-2297 |
| Primary Part Number | 1339AS671-1 |
| Item Name | Register,air |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Fin Spacing | 0.500 INCHES IN |
| Bar Adjustability | NONADJUSTABLE |
| Grille Fin Type | FIXED HORIZONTAL |
| Overall Thickness | 1.630 INCHES NOMINAL IN |
| Shape | RECTANGULAR |
| Grille Bar Position | HORIZONTAL |
| Bar Spacing in Inches | 0.500 |
| Frame Removability | NONREMOVABLE |
| Material | STEEL |
| Grille Quantity | 1 |
| 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 |
|---|---|
| 1339AS671-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 1339AS671-1 | Gichner Systems Group, Inc. Div C5isr Division (USA) |
| Reference | Meaning |
|---|---|
| 1339AS671 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 50GHFF | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 60GHFF | C/1 Advisory reference — outside the item-of-supply concept Kruger and White Mfg Co Inc |
NSN 4520-01-406-2297 is a Register,air, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-406-2297 has 2 manufacturer part numbers on file: 1339AS671-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 1339AS671-1 (Gichner Systems Group, Inc. Div C5isr Division).
Key specifications for 1339AS671-1: Fin Spacing: 0.500 INCHES IN; Bar Adjustability: NONADJUSTABLE; Grille Fin Type: FIXED HORIZONTAL; Overall Thickness: 1.630 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.