The Piston,valve, cataloged under National Stock Number 4820-01-358-8908, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hale Hamilton (valves) Ltd Div Cad Uxbridge. Government technical data includes 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-358-8908 |
| Primary Part Number | NB43539 PL-7980 ITEM 30 |
| Item Name | Piston,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hale Hamilton (valves) Ltd Div Cad Uxbridge |
| Status | ACTIVE |
| Valve Model Number for Which Designed | NB43539 |
| Valve Design Control Activity | 95310 |
| 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 |
|---|---|
| NB43539 PL-7980 ITEM 30 | Hale Hamilton (valves) Ltd Div Cad Uxbridge (GBR) |
| NC43739 | Hale Hamilton (valves) Ltd Div Cad Uxbridge (GBR) |
| Reference | Meaning |
|---|---|
| NB43539 PL-7980 ITEM 30 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| NB43539 PL-7980 ITEM 30 | 3/9 Design control — primary reference Gulf Coast Holdings, Inc Dba Unidynamics |
| NB43539 PL-7980 ITEM 30 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-358-8908 is a Piston,valve, manufactured by Hale Hamilton (valves) Ltd Div Cad Uxbridge, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-358-8908 has 2 manufacturer part numbers on file: NB43539 PL-7980 ITEM 30 (Hale Hamilton (valves) Ltd Div Cad Uxbridge), NC43739 (Hale Hamilton (valves) Ltd Div Cad Uxbridge).
Key specifications for NB43539 PL-7980 ITEM 30: Valve Model Number for Which Designed: NB43539; Valve Design Control Activity: 95310. 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.