The Stem,fluid Valve, cataloged under National Stock Number 4820-01-423-1824, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Acme Cryogenics, Inc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-423-1824 |
| Primary Part Number | 81-2542-03023 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Acme Cryogenics, Inc |
| Status | ACTIVE |
| Valve Type for Which Designed | GLOBE |
| Valve Size for Which Designed | 0.500 INCHES IN |
| Surface Treatment | CHROMATE |
| 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 |
|---|---|
| 81-2542-03023 PRIMARY | Acme Cryogenics, Inc (USA) |
| Reference | Meaning |
|---|---|
| 81-2542-03001 | D/9 Drawing number reference only Chart Inc Div Cryogenic Systems Div |
| 81-2542-03023 | 5/9 Secondary reference Chart Inc Div Cryogenic Systems Div |
| 81-2542-03023CP | C/1 Advisory reference — outside the item-of-supply concept Chart Inc Div Cryogenic Systems Div |
| 81-2542-03001 ITEM 3 | 5/9 Secondary reference Chart Inc Div Cryogenic Systems Div |
| 81-2542-03001 ITEM 3 | 5/9 Secondary reference Acme Cryogenics, Inc |
NSN 4820-01-423-1824 is a Stem,fluid Valve, manufactured by Acme Cryogenics, Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-423-1824 has 1 manufacturer part number on file: 81-2542-03023 (Acme Cryogenics, Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-423-1986, 4820-01-423-1992. Verify interchangeability with system specifications before substitution.
Key specifications for 81-2542-03023: Valve Type for Which Designed: GLOBE; Overall Length: 13.250 INCHES NOMINAL IN; Valve Size for Which Designed: 0.500 INCHES IN; Special Features: LOX CLEANED PER CVI SPEC NO. 27-2000, REV C, PARA 16.0. 4 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.