The Valve,check, cataloged under National Stock Number 4820-00-266-9519, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. Government technical data includes 19 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-266-9519 |
| Primary Part Number | 1281N-212 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Furnished Items and Quantity | 1 LEVER |
| Flange Face Design | PLAIN FIRST END |
| Bolt Circle Nominal Diameter | 5.000 INCHES FIRST END IN |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.562 INCHES FIRST END IN |
| Valve Size | 2.500 INCHES IN |
| Nondefinitive Spec/std Data | A TYPE AND 1 CLASS |
| Nominal Outside Diameter | 6.125 INCHES FIRST END IN |
| Bolt Hole Quantity | 6 FIRST END |
| Face to Face Distance | 8.312 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.500 INCHES FIRST END IN |
| 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 |
|---|---|
| 1281N-212 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1281N 2 1-2IN | 3/9 Design control — primary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| MIL-V-17547 TYPEA CLASS 1 | 5/9 Secondary reference U.S. Government activity |
| MILV17547 | 5/9 Secondary reference U.S. Government activity |
| DD4904 | 5/9 Secondary reference U.S. Government activity |
| N8742-70 | 5/9 Secondary reference The Walworth Company |
NSN 4820-00-266-9519 is a Valve,check, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-266-9519 has 1 manufacturer part number on file: 1281N-212 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
Key specifications for 1281N-212: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES FIRST END; Furnished Items and Quantity: 1 LEVER; Flange Face Design: PLAIN FIRST END. 19 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.