The Ring,valve Piston, cataloged under National Stock Number 4820-01-429-8364, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Pioneer Industries, Llc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-429-8364 |
| Primary Part Number | NK4379-1 |
| Item Name | Ring,valve Piston |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Pioneer Industries, Llc |
| Status | ACTIVE |
| Material | IRON |
| 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 |
|---|---|
| NK4379-1 PRIMARY | Pioneer Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| S1134PC18 | 5/9 Secondary reference U.S. Government activity |
| S1134 | D/9 Drawing number reference only U.S. Government activity |
| NK4379-1 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-429-8364 is a Ring,valve Piston, manufactured by Pioneer Industries, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-429-8364 has 1 manufacturer part number on file: NK4379-1 (Pioneer Industries, Llc).
Key specifications for NK4379-1: End Item Identification: WEAPON SYSTEM E/I SEAWOLF CLASS SSN; Material: IRON. 1 specification is 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.