The Stem,fluid Valve, cataloged under National Stock Number 4820-00-338-2991, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-338-2991 |
| Primary Part Number | CLK1S5501-716324PC25 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Largest Outside Diameter | 0.609 INCHES NOMINAL IN |
| 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 |
|---|---|
| CLK1S5501-716324PC25 PRIMARY | Naval Sea Systems Command (USA) |
| H3105856REV2PC126 PRIMARY | Naval Sea Systems Command (USA) |
| 3158437REVAPC126 PRIMARY | Naval Sea Systems Command (USA) |
| TF-11 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| S4700H3105857REV2PC126 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| BS5-2043PC25 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| CLK1S5501-716324PC25 | 5/9 Secondary reference U.S. Government activity |
| S4700H3105857REV2PC126 | 5/9 Secondary reference U.S. Government activity |
| BS5-2021PC126 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| BS5-2065PC126 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| H3105856REV2PC126 | 5/9 Secondary reference U.S. Government activity |
| 3158437REVAPC126 | 5/9 Secondary reference U.S. Government activity |
| BS5-2019PC126 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4820-00-338-2991 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-338-2991 has 5 manufacturer part numbers on file: CLK1S5501-716324PC25 (Naval Sea Systems Command), H3105856REV2PC126 (Naval Sea Systems Command), 3158437REVAPC126 (Naval Sea Systems Command), TF-11 (Circor Naval Solutions Llc Dba Warren Pumps), S4700H3105857REV2PC126 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5950-00-617-9400. Verify interchangeability with system specifications before substitution.
Key specifications for CLK1S5501-716324PC25: Largest Outside Diameter: 0.609 INCHES NOMINAL IN; Overall Length: 2.250 INCHES NOMINAL IN; Material: COPPER ALLOY. 2 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.