The Parts Kit,valve, cataloged under National Stock Number 4820-01-470-4128, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aquamatic Inc. Government technical data includes 5 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. 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 | 4820-01-470-4128 |
| Primary Part Number | 421RA |
| Item Name | Parts Kit,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aquamatic Inc |
| Status | ACTIVE |
| Component Quantity | 8 |
| Model Number | SERIES V421 STANDARD MODEL |
| Nonsupply Items and Quantities | 04816 DWG V421-1F ITEM 3 HEX LOCK NUT 2; ITEM 5 O-RING 1; ITEM 8 GASKET 2; ITEM 9 O-RING 1; ITEM 14 DIAPHRAGM 1; ITEM 16 O-RING 1 |
| Document Source | 04816 |
| Functional Description | FOR BOTH 3/4 INCH AND 1 INCH SERIES V421 STANDARD MODEL DIAPHRAGM VALVES IN |
| 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 |
|---|---|
| 421RA PRIMARY | Aquamatic Inc (USA) |
NSN 4820-01-470-4128 is a Parts Kit,valve, manufactured by Aquamatic Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-470-4128 has 1 manufacturer part number on file: 421RA (Aquamatic Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-540-8658. Verify interchangeability with system specifications before substitution.
Key specifications for 421RA: Component Quantity: 8; Model Number: SERIES V421 STANDARD MODEL; Nonsupply Items and Quantities: 04816 DWG V421-1F ITEM 3 HEX LOCK NUT 2; ITEM 5 O-RING 1; ITEM 8 GASKET 2; ITEM 9 O-RING 1; ITEM 14 DIAPHRAGM 1; ITEM 16 O-RING 1; Document Source: 04816. 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.