The Valve,regulating,system Pressure, cataloged under National Stock Number 4820-01-668-8825, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-668-8825 |
| Primary Part Number | 521-0039 |
| Item Name | Valve,regulating,system Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Supplementary Features | FILTRATION 40 MICRONS |
| Material | ALUMINUM BODY |
| Maximum Inlet Pressure Rating | 103.0 NON-MERCURY ALTERNATIVE - DENTAL PRODUCTS - DENTAL AMALGAMS |
| Outlet Pressure Setting | 724.0 NON-MERCURY ALTERNATIVE - MEDICAL PRODUCTS - FEEDING TUBES |
| Filter | INCLUDED |
| 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 |
|---|---|
| 521-0039 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 4820-01-668-8825 is a Valve,regulating,system Pressure, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-668-8825 has 1 manufacturer part number on file: 521-0039 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 521-0039: Supplementary Features: FILTRATION 40 MICRONS; Part Name Assigned by Controlling Agency: REGULATOR; Material: ALUMINUM BODY; Maximum Inlet Pressure Rating: 103.0 NON-MERCURY ALTERNATIVE - DENTAL PRODUCTS - DENTAL AMALGAMS. 5 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.