The Valve,check, cataloged under National Stock Number 4820-01-571-8532, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sun Hydraulics Corporation. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-571-8532 |
| Primary Part Number | CKBB-XCV |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sun Hydraulics Corporation |
| Status | ACTIVE |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Style Designator | SCREW-IN CARTRIDGE |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Opening Pressure Setting | 30.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| CKBB-XCV PRIMARY | Sun Hydraulics Corporation (USA) |
| Reference | Meaning |
|---|---|
| 20726JA002 FIND 2 | 5/2 Secondary reference U.S. Government activity |
| 20726JA001 FIND 1 | 5/9 Secondary reference U.S. Government activity |
| 196678 | 5/2 Secondary reference U.S. Government activity |
| J196678 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-571-8532 is a Valve,check, manufactured by Sun Hydraulics Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-571-8532 has 1 manufacturer part number on file: CKBB-XCV (Sun Hydraulics Corporation).
Key specifications for CKBB-XCV: Connection Type: THREADED INTERNAL BOSS FIRST END; Style Designator: SCREW-IN CARTRIDGE; Operating Pressure: 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Media for Which Designed: HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE. 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.