The Disk,valve, cataloged under National Stock Number 4820-01-200-8220, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Crane Co Div Valve Div. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-200-8220 |
| Primary Part Number | 29984 PIECE 3 1IN |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Crane Co Div Valve Div |
| Status | ACTIVE |
| Pressure Rating | 660.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 775.0 FAHRENHEIT NOMINAL DEGF |
| Outside Diameter | 1.660 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Radius | 0.830 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 29984 PIECE 3 1IN PRIMARY | Crane Co Div Valve Div (USA) |
| Reference | Meaning |
|---|---|
| 29984 | D/9 Drawing number reference only Crane Co Div Valve Div |
NSN 4820-01-200-8220 is a Disk,valve, manufactured by Crane Co Div Valve Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-200-8220 has 1 manufacturer part number on file: 29984 PIECE 3 1IN (Crane Co Div Valve Div).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-203-4792, 4320-01-645-0968. Verify interchangeability with system specifications before substitution.
Key specifications for 29984 PIECE 3 1IN: Overall Height: 1.840 INCHES NOMINAL IN; Pressure Rating: 660.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: 775.0 FAHRENHEIT NOMINAL DEGF; Outside Diameter: 1.660 INCHES NOMINAL IN. 6 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.