The Ball,check, cataloged under National Stock Number 4820-01-417-9321, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Allied Services and Spares, Inc.. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-417-9321 |
| Primary Part Number | 50002720 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Allied Services and Spares, Inc. |
| Status | ACTIVE |
| Valve Design Control Activity | 0N0J4 |
| 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 |
|---|---|
| 50002720 PRIMARY | Allied Services and Spares, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 50002720 | 5/9 Secondary reference Cm Automotive Systems Inc |
NSN 4820-01-417-9321 is a Ball,check, manufactured by Allied Services and Spares, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-417-9321 has 1 manufacturer part number on file: 50002720 (Allied Services and Spares, Inc.).
Key specifications for 50002720: Part Name Assigned by Controlling Agency: BALL,CHECK VALVE; Valve Design Control Activity: 0N0J4; End Item Identification: 2320-01-318-9902 HET (HEAVY EQUIPMENT TRANSPORTER). 1 specification is 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.