The Valve,check, cataloged under National Stock Number 4820-01-697-6883, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Specialty Mfg. Co Dba Specialty Mfg. Co. Government technical data includes 13 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 | 4820-01-697-6883 |
| Primary Part Number | CHK BRS 410-4M4F-B |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Specialty Mfg. Co Dba Specialty Mfg. Co |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.250 INCHES ALL ENDS IN |
| Connection Style | PLAIN, OPTIONAL END (PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.250 INCHES IN |
| Nominal Outside Diameter | 0.250 INCHES FIRST END IN |
| Surface Treatment | NICKEL |
| Media for Which Designed | LIQUID SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| CHK BRS 410-4M4F-B PRIMARY | The Specialty Mfg. Co Dba Specialty Mfg. Co (USA) |
NSN 4820-01-697-6883 is a Valve,check, manufactured by The Specialty Mfg. Co Dba Specialty Mfg. Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-697-6883 has 1 manufacturer part number on file: CHK BRS 410-4M4F-B (The Specialty Mfg. Co Dba Specialty Mfg. Co).
Key specifications for CHK BRS 410-4M4F-B: Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN; Connection Style: PLAIN, OPTIONAL END (PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND END. 13 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.