The Piston,valve, cataloged under National Stock Number 4820-01-200-2387, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Singer Valve Inc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-200-2387 |
| Primary Part Number | P-25R620-A |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Singer Valve Inc |
| Status | ACTIVE |
| Valve Type for Which Designed | PRESSURE REDUCING |
| Valve Model Number for Which Designed | 620 |
| Material Document and Classification | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 2.500 INCHES IN |
| Valve Design Control Activity | 36266 |
| 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 |
|---|---|
| P-25R620-A PRIMARY | Singer Valve Inc (CAN) |
| C5013 PIECE 9 | Singer Valve Inc (CAN) |
| Reference | Meaning |
|---|---|
| C5013 | D/9 Drawing number reference only Singer Valve Inc |
NSN 4820-01-200-2387 is a Piston,valve, manufactured by Singer Valve Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-200-2387 has 2 manufacturer part numbers on file: P-25R620-A (Singer Valve Inc), C5013 PIECE 9 (Singer Valve Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-200-2388, 2030-01-728-9829. Verify interchangeability with system specifications before substitution.
Key specifications for P-25R620-A: Valve Type for Which Designed: PRESSURE REDUCING; Valve Model Number for Which Designed: 620; Material Document and Classification: ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE; Valve Size for Which Designed: 2.500 INCHES IN. 6 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.