The Ball,check, cataloged under National Stock Number 4820-00-689-5992, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Altec Air, Llc Dba Altec Llc. Government technical data includes 3 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-689-5992 |
| Primary Part Number | 400-375 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Altec Air, Llc Dba Altec Llc |
| Status | ACTIVE |
| Spherical Diameter | 0.450 INCHES NOMINAL IN |
| Valve Design Control Activity | 06178 |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| 400-375 PRIMARY | Altec Air, Llc Dba Altec Llc (USA) |
NSN 4820-00-689-5992 is a Ball,check, manufactured by Altec Air, Llc Dba Altec Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-689-5992 has 1 manufacturer part number on file: 400-375 (Altec Air, Llc Dba Altec Llc).
1 possible match (shared part number, not a government interchangeability claim): 5360-01-374-3301. Verify interchangeability with system specifications before substitution.
Key specifications for 400-375: Spherical Diameter: 0.450 INCHES NOMINAL IN; Valve Design Control Activity: 06178; End Item Identification: DEFENSE SUPPORT PROGRAM; Material: RUBBER FLUOROCARBON CLASS FPM. 3 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.