The Valve,gate, cataloged under National Stock Number 4820-01-577-0158, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-577-0158 |
| Primary Part Number | 1146-A20U 114 |
| Item Name | Valve,gate |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 HANDWHEEL |
| Inlet Relationship with Outlet | IDENTICAL |
| Nominal Pipe Size Accommodated | 1.250 INCHES IN |
| Maximum Operating Temp and Media for Which Designed | 150.0 FAHRENHEIT AIR AND 150.0 FAHRENHEIT OIL, LUBRICATING, DIESTER BASE AND 150.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER DEGF |
| Operating Pressure and Type | 400.0 POUNDS PER SQUARE INCH (PSI) AIR MAXIMUM REQUIRED AND 400.0 POUNDS PER SQUARE INCH (PSI) LUBRICATING OIL DIESTER BASE MAXIMUM REQUIRED AND 400.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 400.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Stem Type | RISING |
| Connection Type | SOCKET, WELD, PIPE |
| Material Document and Classification | ASTM B505 UNS C92200 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Valve Size | 1.250 INCHES IN |
| Bonnet Type | PACKING RETAINING |
| Material | NICKEL ALLOY STEM |
| 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 |
|---|---|
| 1146-A20U 114 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 1146-A20U 1.25IN PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1146-A20U P/N 1146-A20U 1.25IN | 5/9 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| 1146-A20U | 5/9 Secondary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
NSN 4820-01-577-0158 is a Valve,gate, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-577-0158 has 2 manufacturer part numbers on file: 1146-A20U 114 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 1146-A20U 1.25IN (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-578-0250, 4820-01-656-6431. Verify interchangeability with system specifications before substitution.
Key specifications for 1146-A20U 114: Furnished Items and Quantity: 1 HANDWHEEL; Inlet Relationship with Outlet: IDENTICAL; Nominal Pipe Size Accommodated: 1.250 INCHES IN; Maximum Operating Temp and Media for Which Designed: 150.0 FAHRENHEIT AIR AND 150.0 FAHRENHEIT OIL, LUBRICATING, DIESTER BASE AND 150.0 FAHRENHEIT STEAM AND 150.0 FAHRENHEIT WATER DEGF. 12 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.