The Stem,fluid Valve, cataloged under National Stock Number 4820-01-258-6931, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-258-6931 |
| Primary Part Number | NB23012543 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Valve Type for Which Designed | RELIEF |
| Stem Actuating End Type | THREADED EXTERNALLY |
| Valve Model Number for Which Designed | MODEL 30 |
| Valve Size for Which Designed | 0.500 INCHES IN |
| Material | NICKEL 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 |
|---|---|
| NB23012543 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| B230125-43 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| N-585 1/2IN PIECE 5 | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| N-583-5 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| N-585 PIECE 5 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| N-585 | D/9 Drawing number reference only Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-258-6931 is a Stem,fluid Valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-258-6931 has 3 manufacturer part numbers on file: NB23012543 (Leslie Controls, Inc. Dba Leslie Controls Inc), B230125-43 (Leslie Controls, Inc. Dba Leslie Controls Inc), N-585 1/2IN PIECE 5 (Leslie Controls, Inc. Dba Leslie Controls Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-258-7267, 4820-01-428-1750. Verify interchangeability with system specifications before substitution.
Key specifications for NB23012543: Valve Type for Which Designed: RELIEF; Stem Actuating End Type: THREADED EXTERNALLY; Valve Model Number for Which Designed: MODEL 30; Valve Size for Which Designed: 0.500 INCHES IN. 5 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.