The Valve,check, cataloged under National Stock Number 4820-00-830-6816, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bae Systems Land & Armaments L.p.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-830-6816 |
| Primary Part Number | BUWEPSLD419987 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES SECOND END |
| Flange Face Design | PLAIN SECOND END |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | FLANGE SECOND END |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Mounting Facility | BRACKET(S) |
| Nominal Width | 2.125 INCHES SECOND END IN |
| Face to Face Distance | 4.125 INCHES IN |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| LD419987 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| BUWEPSLD419987 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| 2120960 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 4820PL0928947 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-00-830-6816 is a Valve,check, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-830-6816 has 3 manufacturer part numbers on file: LD419987 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), BUWEPSLD419987 (Bae Systems Land & Armaments L.p.), 2120960 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for BUWEPSLD419987: Flange Shape: RECTANGULAR WITH HOLES SECOND END; Flange Face Design: PLAIN SECOND END; Connection Type: UNTHREADED INTERNAL PIPE FIRST END; Connection Type: FLANGE SECOND END. 9 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.