The Valve,antibackdraft, cataloged under National Stock Number 4820-01-080-9677, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Stratotech Llc. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Valve,antibackdraft |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Stratotech Llc (CAGE 15939); Gichner Systems Group, Inc. Div C5isr Division (CAGE 29381) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-080-9677 |
| Primary Part Number | 556-100-L1.0-S0.75 RFL |
| Item Name | Valve,antibackdraft |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Stratotech Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 556-100-L1.0-S0.75 RFL PRIMARY | Stratotech Llc (USA) |
| 6000159-2 | Gichner Systems Group, Inc. Div C5isr Division (USA) |
| Reference | Meaning |
|---|---|
| 556-100-L0.75-S1.0-RFL | 5/9 Secondary reference Stratotech Llc |
NSN 4820-01-080-9677 is a Valve,antibackdraft, manufactured by Stratotech Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-080-9677 has 2 manufacturer part numbers on file: 556-100-L1.0-S0.75 RFL (Stratotech Llc), 6000159-2 (Gichner Systems Group, Inc. Div C5isr Division).
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.