The Valve,butterfly, cataloged under National Stock Number 4820-01-203-2177, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-203-2177 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Criticality Code Justification | ZZZYZZZY |
| Style Designator | STRAIGHT THRU |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY 400 PACKING |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 941-703-050-139-050 | 3/1 Design control — primary reference Emerson Automation Solutions Final Control Us Lp |
NSN 4820-01-203-2177 is a Valve,butterfly, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-203-2177: Criticality Code Justification: ZZZYZZZY; Style Designator: STRAIGHT THRU; Special Features: VALVE SIZE IS 5.000 INCHVALVE SIZE IS 5.000 INCH IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE. 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.
NSN 4820-01-203-2177 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.