The Ball,check, cataloged under National Stock Number 4820-01-025-1536, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tate Andale, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-025-1536 |
| Primary Part Number | 24421 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tate Andale, Llc |
| Status | ACTIVE |
| Spherical Diameter | 3.000 INCHES NOMINAL IN |
| Valve Model Number for Which Designed | 52-90F |
| Valve Size for Which Designed | 2.000 INCHES IN |
| Valve Design Control Activity | 09032 |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 24421 PRIMARY | Tate Andale, Llc (USA) |
| Reference | Meaning |
|---|---|
| 3-410-M20-01 | D/9 Drawing number reference only Tate Andale, Llc |
NSN 4820-01-025-1536 is a Ball,check, manufactured by Tate Andale, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-025-1536 has 1 manufacturer part number on file: 24421 (Tate Andale, Llc).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-052-5766, 4820-01-130-8829, 4820-01-472-8782. Verify interchangeability with system specifications before substitution.
Key specifications for 24421: Spherical Diameter: 3.000 INCHES NOMINAL IN; Valve Model Number for Which Designed: 52-90F; Valve Size for Which Designed: 2.000 INCHES IN; Part Name Assigned by Controlling Agency: FLOAT. 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.