The Valve,check, cataloged under National Stock Number 4820-01-249-9963, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Metro Machine Corp. Dba Metro Machine Div Metro Machine Corp D/b/a General Dynamics Nassco-Norfolk. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Metro Machine Corp. Dba Metro Machine Div Metro Machine Corp D/b/a General Dynamics Nassco-Norfolk (CAGE 19468) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-249-9963 |
| Primary Part Number | 1920B-1-15BRS350PSI-1-1/4 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Metro Machine Corp. Dba Metro Machine Div Metro Machine Corp D/b/a General Dynamics Nassco-Norfolk |
| Status | ACTIVE |
| 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 |
|---|---|
| 1920B-1-15BRS350PSI-1-1/4 PRIMARY | Metro Machine Corp. Dba Metro Machine Div Metro Machine Corp D/b/a General Dynamics Nassco-Norfolk (USA) |
| Reference | Meaning |
|---|---|
| 1920B-1-15 | D/9 Drawing number reference only U.S. Government activity |
| 1920B-1-15BRS35 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 1920B-1-15BRS350PSI-1-1/4 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-249-9963 is a Valve,check, manufactured by Metro Machine Corp. Dba Metro Machine Div Metro Machine Corp D/b/a General Dynamics Nassco-Norfolk, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-249-9963 has 1 manufacturer part number on file: 1920B-1-15BRS350PSI-1-1/4 (Metro Machine Corp. Dba Metro Machine Div Metro Machine Corp D/b/a General Dynamics Nassco-Norfolk).
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.