The Piston,valve, cataloged under National Stock Number 4820-01-503-3556, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sealcraft Corporation. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-503-3556 |
| Primary Part Number | 09344 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sealcraft Corporation |
| Status | ACTIVE |
| Valve Type for Which Designed | PRESSURE REDUCING |
| Valve Model Number for Which Designed | 12435N |
| Material Document and Classification | ASTM-B61 ASSN STD SINGLE MATERIAL RESPONSE |
| Specification/standard Data | MIL-V-17848B (DATED 12 NOV 1968) CLASS A, COMP E GOVERNMENT SPECIFICATION |
| Valve Size for Which Designed | 0.750 INCHES IN |
| Valve Design Control Activity | 81349 |
| 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 |
|---|---|
| 12435N PC NO. 17 | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| 09344 PRIMARY | Sealcraft Corporation (USA) |
| Reference | Meaning |
|---|---|
| 12435N | D/9 Drawing number reference only Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-503-3556 is a Piston,valve, manufactured by Sealcraft Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-503-3556 has 2 manufacturer part numbers on file: 12435N PC NO. 17 (Leslie Controls, Inc. Dba Leslie Controls Inc), 09344 (Sealcraft Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-503-8419. Verify interchangeability with system specifications before substitution.
Key specifications for 09344: Valve Type for Which Designed: PRESSURE REDUCING; Valve Model Number for Which Designed: 12435N; Material Document and Classification: ASTM-B61 ASSN STD SINGLE MATERIAL RESPONSE; Specification/standard Data: MIL-V-17848B (DATED 12 NOV 1968) CLASS A, COMP E GOVERNMENT SPECIFICATION. 7 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.