The Disk,valve, cataloged under National Stock Number 4820-01-433-2581, 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 4 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-433-2581 |
| Primary Part Number | 3871-R-160 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Style Designator | SWING CHECK |
| Media for Which Designed | HYDRAULIC FLUID OR STEAM |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 1291 5.00IN ITEM 4 | Valve Automation and Control of San Diego Dba Valve Automation & Control of San Diego Div Valve Automation and Controls of (USA) |
| 1281-001 5IN ITEM NO.4 | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 3871-R-160 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 1291 5.00IN ITEM 4 | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 3871-R | 5/9 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
NSN 4820-01-433-2581 is a Disk,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-433-2581 has 4 manufacturer part numbers on file: 1291 5.00IN ITEM 4 (Valve Automation and Control of San Diego Dba Valve Automation & Control of San Diego Div Valve Automation and Controls of), 1281-001 5IN ITEM NO.4 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 3871-R-160 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 1291 5.00IN ITEM 4 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
Key specifications for 3871-R-160: Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 225.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Style Designator: SWING CHECK; Special Features: FOR SWING CHECK VALVE; Media for Which Designed: HYDRAULIC FLUID OR STEAM. 4 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.