The Valve,stop-Check, cataloged under National Stock Number 4820-00-419-3201, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-419-3201 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Nominal Pipe Size Accommodated | 2.000 INCHES FIRST END IN |
| Mounting Position | HORIZONTAL |
| Criticality Code Justification | ZZZY |
| Connection Type | BUTT WELD PIPE FIRST END |
| Style Designator | STRAIGHT THRU W/OFFSET |
| Features Provided | BONNET PACKING |
| Offset Distance | 2.875 INCHES IN |
| Bonnet Type | INSIDE SCREW |
| Disk Loading Method | WEIGHT |
| Bonnet Attachment Method | BOLTED |
| Valve Operation Method | MANUAL |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTIONS FOR LEVEL 1 SUB-SAFE ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 23730 | 5/9 Secondary reference Moog Inc Div Moog Inc., Space and Defense - Salt Lake City |
| 23730 | 5/9 Secondary reference E-Systems Inc Montek Div Fluid Controls Opns |
| 23730SS | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 23730 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-00-419-3201 is a Valve,stop-Check, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6620-00-656-3702, 5910-00-947-6978. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-419-3201: Flow Control Device: POPPET; Nominal Pipe Size Accommodated: 2.000 INCHES FIRST END IN; Mounting Position: HORIZONTAL; Criticality Code Justification: ZZZY. 13 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.
NSN 4820-00-419-3201 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.