The Terminal,ventilation Duct, cataloged under National Stock Number 4520-01-722-3444, 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 Broan-Nutone Llc Dba Broan. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-722-3444 |
| Primary Part Number | 634 |
| Item Name | Terminal,ventilation Duct |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Broan-Nutone Llc Dba Broan |
| Status | ACTIVE |
| Fitting Inside Diameter | 8.0 INCHES MAXIMUM IN |
| Overall Thickness | 0.701 MILLIMETERS NOMINAL MM |
| Style Designator | FIXED 90 DEG ANGLE |
| Length | 10.75 INCHES IN |
| Width | 10.25 INCHES IN |
| Damper | INCLUDED |
| Surface Treatment | PAINT |
| Material | STEEL |
| Fitting Overall Length | 10.0 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4520-01-722-3444 is a Terminal,ventilation Duct, manufactured by Broan-Nutone Llc Dba Broan, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-722-3444 has 2 manufacturer part numbers on file: 61HL78 (Grainger Integrated Supply Div Grainger Integrated Supply), 634 (Broan-Nutone Llc Dba Broan).
Key specifications for 634: Overall Height: 6.625 INCHES NOMINAL IN; Fitting Inside Diameter: 8.0 INCHES MAXIMUM IN; Overall Thickness: 0.701 MILLIMETERS NOMINAL MM; Style Designator: FIXED 90 DEG ANGLE. 9 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.