The Valve,lift-Check, cataloged under National Stock Number 4820-01-434-3344, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-434-3344 |
| Primary Part Number | 803-6397434-244121 |
| Item Name | Valve,lift-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 1 CAP AND 1 WRENCH |
| Renewable Seat Ring Type | THREADED |
| Nominal Pipe Size Accommodated | 1.000 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | MIL-C-24252 COMP 1 COND A MIL SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | MIL-C-24252 COMP 1 COND CA-7 MIL SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | MIL-R-83248 TY 1 CL2 90 DUROMETER MIL SPEC SINGLE MATERIAL RESPONSE PACKING |
| Bonnet Type | PACKING RETAINING |
| Material | RUBBER FLUOROCARBON CLASS FPM PACKING |
| Material | COBALT AND CHROMIUM AND NICKEL FLOW CONTROL DEVICE |
| Material | COBALT AND CHROMIUM AND NICKEL SEAT |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 803-6397434-244121 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211031925 | 5/9 Secondary reference Naval Sea Systems Command |
| 6397434 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-434-3344 is a Valve,lift-Check, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-434-3344 has 1 manufacturer part number on file: 803-6397434-244121 (Naval Sea Systems Command).
Key specifications for 803-6397434-244121: Flow Control Device: DISK; Furnished Items and Quantity: 1 CAP AND 1 WRENCH; Renewable Seat Ring Type: THREADED; Nominal Pipe Size Accommodated: 1.000 INCHES ALL ENDS IN. 16 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.