The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-515-5523, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Entwistle Company Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-515-5523 |
| Primary Part Number | KT-4856-3 ITEM 6 |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| KT-3070-53 | The Entwistle Company Llc (USA) |
| KT-4856-3 ITEM 6 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| KT-4856-3 ITEM 6 | 3/9 Design control — primary reference Entwistle Co the Kenett Hydraulic Systems Div |
| KT-3070-53 | 5/9 Secondary reference Entwistle Co the Kenett Hydraulic Systems Div |
NSN 4820-01-515-5523 is a Valve,bleeder,hydraulic System, manufactured by The Entwistle Company Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-515-5523 has 2 manufacturer part numbers on file: KT-3070-53 (The Entwistle Company Llc), KT-4856-3 ITEM 6 (The Entwistle Company Llc).
Key specifications for KT-4856-3 ITEM 6: End Item Identification: W/S VIRGINIA CLASS SUBMARINE; E/I BACK PACK ASSY. 0 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.
NSN 4820-01-515-5523 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.