The Valve,stop-Check, cataloged under National Stock Number 4820-01-421-8149, 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 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-8149 |
| Primary Part Number | 211036140 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Furnished Items and Quantity | 1 HANDWHEEL |
| Nominal Pipe Size Accommodated | 1.000 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| 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 FLOW CONTROL DEVICE |
| Material Document and Classification | MIL-C-24252, COMP 1, COND A MIL SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | QQ-N-281, CLASS A, FORM 2 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Bonnet Type | PACKING RETAINING |
| Material | NICKEL ALLOY 400 BODY |
| Material | COBALT COMP L-605 STEM |
| Material | COBALT COMP L-605 FLOW CONTROL DEVICE |
| 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 |
|---|---|
| 211036140 PRIMARY | Naval Sea Systems Command (USA) |
| 803-6397434-143121 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6397434 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-421-8149 is a Valve,stop-Check, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-8149 has 2 manufacturer part numbers on file: 211036140 (Naval Sea Systems Command), 803-6397434-143121 (Naval Sea Systems Command).
Key specifications for 211036140: Flow Control Device: DISK; Furnished Items and Quantity: 1 HANDWHEEL; Nominal Pipe Size Accommodated: 1.000 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS. 15 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.