The Parts Kit,pressure Regulating VA, cataloged under National Stock Number 4820-01-439-5772, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Refrigeration Systems Co. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-439-5772 |
| Primary Part Number | 202028 |
| Item Name | Parts Kit,pressure Regulating VA |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Refrigeration Systems Co |
| Status | ACTIVE |
| End Item Source | 91051 |
| End Item Name | VALVE,REGULATING FLUID PRESSURE |
| 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 |
|---|---|
| 202028 | Refrigeration Systems Co (USA) |
| Reference | Meaning |
|---|---|
| 202028 | 3/2 Design control — primary reference U.S. Government activity |
| SB23-07 IT33,34 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-439-5772 is a Parts Kit,pressure Regulating VA, manufactured by Refrigeration Systems Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-439-5772 has 1 manufacturer part number on file: 202028 (Refrigeration Systems Co).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-576-7801. Verify interchangeability with system specifications before substitution.
Key specifications for 202028: End Item Source: 91051; End Item Name: VALVE,REGULATING FLUID PRESSURE; Special Features: APPL.4.000 IN.VALVE SIZE IN; End Item Identification: MODEL A4AO. 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.