The Ball,check, cataloged under National Stock Number 4820-01-115-0980, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Down East, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-115-0980 |
| Primary Part Number | C-1550-19 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Down East, Inc. |
| Status | ACTIVE |
| Spherical Diameter | 0.156 INCHES NOMINAL IN |
| Valve Model Number for Which Designed | 1550 |
| Valve Size for Which Designed | 0.750 INCHES IN |
| Valve Design Control Activity | 55650 |
| 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 |
|---|---|
| C-1550-19 PRIMARY | Down East, Inc. (USA) |
| Reference | Meaning |
|---|---|
| C-1550 | D/9 Drawing number reference only Down East, Inc. |
NSN 4820-01-115-0980 is a Ball,check, manufactured by Down East, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-115-0980 has 1 manufacturer part number on file: C-1550-19 (Down East, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-116-9894, 5985-01-253-0278, 5910-01-272-2284. Verify interchangeability with system specifications before substitution.
Key specifications for C-1550-19: Spherical Diameter: 0.156 INCHES NOMINAL IN; Valve Model Number for Which Designed: 1550; Valve Size for Which Designed: 0.750 INCHES IN; Valve Design Control Activity: 55650. 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.