The Float,valve, cataloged under National Stock Number 4820-00-439-6325, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Armstrong International Inc Dba Armstrong Machine Works. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-439-6325 |
| Primary Part Number | A3214 |
| Item Name | Float,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Armstrong International Inc Dba Armstrong Machine Works |
| Status | ACTIVE |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| Connection Type | THREADED |
| Quantity | 1 |
| Shape | ROUND |
| Thread Location | INTERNAL |
| System for Which Designed | OPEN |
| Material | STEEL CORROSION RESISTING |
| Thread Size and Series/type Designator | 1/8-27 NPT |
| 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 |
|---|---|
| A3214 PRIMARY | Armstrong International Inc Dba Armstrong Machine Works (USA) |
| MS2174PC10 | Armstrong International Inc Dba Armstrong Machine Works (USA) |
| Reference | Meaning |
|---|---|
| 3318637 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-439-6325 is a Float,valve, manufactured by Armstrong International Inc Dba Armstrong Machine Works, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-439-6325 has 2 manufacturer part numbers on file: A3214 (Armstrong International Inc Dba Armstrong Machine Works), MS2174PC10 (Armstrong International Inc Dba Armstrong Machine Works).
5 possible matches (shared part number, not a government interchangeability claim): 5935-00-674-6542, 5915-01-149-8524, 4820-01-210-3475. Verify interchangeability with system specifications before substitution.
Key specifications for A3214: Overall Diameter: 4.000 INCHES NOMINAL IN; Connection Type: THREADED; Quantity: 1; Shape: ROUND. 8 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.