The Valve,check, cataloged under National Stock Number 4820-01-485-3278, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-485-3278 |
| Primary Part Number | 8HB282 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Thread Pitch in Millimeters | 33.337 ALL ENDS |
| Operating Pressure | 3000.000 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Material | STEEL BODY |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 8HB282 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 8HB282 | 3/9 Design control — primary reference Oshkosh Corp |
| CV1-16-P-0-20 | 5/9 Secondary reference Modular Controls Corp |
NSN 4820-01-485-3278 is a Valve,check, manufactured by Oshkosh Defense Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-485-3278 has 1 manufacturer part number on file: 8HB282 (Oshkosh Defense Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-632-7849. Verify interchangeability with system specifications before substitution.
Key specifications for 8HB282: Flow Control Device: POPPET; Thread Pitch in Millimeters: 33.337 ALL ENDS; Operating Pressure: 3000.000 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Special Features: CHECK VALVE, GENERAL PURPOSE HYDRAULIC. 6 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.