The Valve,check, cataloged under National Stock Number 4820-00-653-1679, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bae Systems Land & Armaments L.p.. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-653-1679 |
| Primary Part Number | S4805F3227910 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| Status | ACTIVE |
| Renewable Seat Ring Type | THREADED |
| Connection Style | SOCKET (TUBE) SECOND END |
| Connection Style | SOCKET (TUBE) THIRD END |
| Connection Style | SOCKET (TUBE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Supplementary Features | FLOW CONTROL DEVICE: DIAPHRAGM |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED INTERNAL TUBE SECOND END |
| Connection Type | UNTHREADED INTERNAL TUBE THIRD END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | ASTM D735,GR SB910ABEFL ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-C-390,D4 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.675 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.675 INCHES THIRD END IN |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Disk Loading Method | WEIGHT |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 STEM |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 SEAT |
| Material | RUBBER SYNTHETIC FLOW CONTROL DEVICE |
| Material | COPPER ALLOY 922 BODY |
| 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 |
|---|---|
| S4805F3227910 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| C4385F | 3/2 Design control — primary reference U.S. Government activity |
| C4385 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-653-1679 is a Valve,check, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-653-1679 has 1 manufacturer part number on file: S4805F3227910 (Bae Systems Land & Armaments L.p.).
Key specifications for S4805F3227910: Renewable Seat Ring Type: THREADED; Connection Style: SOCKET (TUBE) SECOND END; Connection Style: SOCKET (TUBE) THIRD END; Connection Style: SOCKET (TUBE) FIRST END. 23 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.