The Valve,ball, cataloged under National Stock Number 4820-01-425-7891, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is United Refrigeration Inc Dba United Refrigeration Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-425-7891 |
| Primary Part Number | 591WA-11ST |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | United Refrigeration Inc Dba United Refrigeration Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 591WA-11ST PRIMARY | United Refrigeration Inc Dba United Refrigeration Inc (USA) |
| Reference | Meaning |
|---|---|
| 591WA-11ST | 5/9 Secondary reference Superior Valve Co |
NSN 4820-01-425-7891 is a Valve,ball, manufactured by United Refrigeration Inc Dba United Refrigeration Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-7891 has 1 manufacturer part number on file: 591WA-11ST (United Refrigeration Inc Dba United Refrigeration Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-435-6130, 4820-01-435-6131. Verify interchangeability with system specifications before substitution.
Key specifications for 591WA-11ST: End Item Identification: VALVE B 1.125IPS500PSI SBU BRASS. 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.
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.