The Ball,check, cataloged under National Stock Number 4820-01-422-5536, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Corland Co. Dba Corland Co. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Ball,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Corland Co. Dba Corland Co (CAGE 5G464) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-422-5536 |
| Primary Part Number | 595-601-125 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Corland Co. Dba Corland Co |
| 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 |
|---|---|
| 595-601-125 | Corland Co. Dba Corland Co (USA) |
| Reference | Meaning |
|---|---|
| 595-601 | 7/2 Vendor item drawing reference U.S. Government activity |
| 595-601-125 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-422-5536 is a Ball,check, manufactured by Corland Co. Dba Corland Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-422-5536 has 1 manufacturer part number on file: 595-601-125 (Corland Co. Dba Corland Co).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-422-7753, 4820-01-422-7759. Verify interchangeability with system specifications before substitution.
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.