The Valve,stop-Check, cataloged under National Stock Number 4820-00-121-6872, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 17 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-121-6872 |
| Primary Part Number | A7103-1L1 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Renewable Seat Ring Type | THREADED |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Connection Style | SOCKET (PIPE) FIRST END |
| Criticality Code Justification | ZZZY |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | VALVE STEM LOCK SHIELD AND BONNET PACKING |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Maximum Operating Temp | 775.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | BOLTED |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Material | STEEL COMP 410 FLOW CONTROL DEVICE |
| Material | STEEL COMP 410 SEAT |
| Material | STEEL CORROSION RESISTING STEM |
| Valve Operation Method | MANUAL |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| A7103-1L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| MIL-V-22094L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| MIL-V-22094 | 4/1 Identification reference U.S. Government activity |
| B31644CL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| W05-3084B-02TSL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 33311-30 W05-3084B-02TS | 5/1 Secondary reference Velan Valve Corp. |
| B31644C | 3/1 Design control — primary reference Flowserve Inc |
| W05-3084B-02TS | 5/1 Secondary reference Velan Valve Corp. |
NSN 4820-00-121-6872 is a Valve,stop-Check, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-121-6872 has 1 manufacturer part number on file: A7103-1L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for A7103-1L1: Flow Control Device: DISK; Renewable Seat Ring Type: THREADED; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Connection Style: SOCKET (PIPE) FIRST END. 17 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.
NSN 4820-00-121-6872 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.