The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-339-8500, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dynex/rivett Corp Power Units and Systems. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-339-8500 |
| Primary Part Number | 56-0032 |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dynex/rivett Corp Power Units and Systems |
| Status | ACTIVE |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Media for Which Designed | OIL, HYDRAULIC SINGLE RESPONSE |
| Valve Operation Method | MANUALMANUAL |
| 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 |
|---|---|
| 56-0032 PRIMARY | Dynex/rivett Corp Power Units and Systems (USA) |
| Reference | Meaning |
|---|---|
| A-15437 PIECE 10 | 5/9 Secondary reference New England Trawler Equipment Co |
| A-15437 PIECE 10 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| A-15437 PIE | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-339-8500 is a Valve,bleeder,hydraulic System, manufactured by Dynex/rivett Corp Power Units and Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-339-8500 has 1 manufacturer part number on file: 56-0032 (Dynex/rivett Corp Power Units and Systems).
2 possible matches (shared part number, not a government interchangeability claim): 6220-01-513-7206, 4220-01-624-8574. Verify interchangeability with system specifications before substitution.
Key specifications for 56-0032: Nominal Thread Size: 0.750 INCHES ALL ENDS IN; Media for Which Designed: OIL, HYDRAULIC SINGLE RESPONSE; End Item Identification: NEW ENGLAND TRAWLER EQUIPMENT CO,HYDRAULIC POWER UNITNEW ENGLAND TRAWLER EQUIPMENT CO,HYDRAULIC POWER UNIT; Valve Operation Method: MANUALMANUAL. 3 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.