The Damper,flue, cataloged under National Stock Number 4520-01-273-9302, 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 Spiral Metals Corporation of Baton Rouge Dba Spiral Metals Corp of Baton Rouge Div Spiral Metals Corp of Baton. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-273-9302 |
| Primary Part Number | SMC-201-77-75X36 IN |
| Item Name | Damper,flue |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Spiral Metals Corporation of Baton Rouge Dba Spiral Metals Corp of Baton Rouge Div Spiral Metals Corp of Baton |
| Status | ACTIVE |
| Overall Thickness | 6.000 INCHES NOMINAL IN |
| Shape | RECTANGULAR |
| Sheet Metal Gage Size | 10 |
| Surface Treatment | ZINC |
| Material | STEEL |
| 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 |
|---|---|
| SMC-201-77-75X36 IN PRIMARY | Spiral Metals Corporation of Baton Rouge Dba Spiral Metals Corp of Baton Rouge Div Spiral Metals Corp of Baton (USA) |
| Reference | Meaning |
|---|---|
| SMC-201-77 ITEM 8 | C/1 Advisory reference — outside the item-of-supply concept Spiral Metals Corporation of Baton Rouge Dba Spiral Metals Corp of Baton Rouge Div Spiral Metals Corp of Baton |
NSN 4520-01-273-9302 is a Damper,flue, manufactured by Spiral Metals Corporation of Baton Rouge Dba Spiral Metals Corp of Baton Rouge Div Spiral Metals Corp of Baton, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-273-9302 has 1 manufacturer part number on file: SMC-201-77-75X36 IN (Spiral Metals Corporation of Baton Rouge Dba Spiral Metals Corp of Baton Rouge Div Spiral Metals Corp of Baton).
Key specifications for SMC-201-77-75X36 IN: Overall Height: 36.000 INCHES NOMINAL IN; Overall Thickness: 6.000 INCHES NOMINAL IN; Shape: RECTANGULAR; Overall Width: 75.000 INCHES NOMINAL IN. 5 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.