The Seat,valve, cataloged under National Stock Number 4810-01-033-5174, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Krobach Mfg. Corp. Dba Krobach Manufacturing Corp. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-033-5174 |
| Primary Part Number | KMC-128C811AA-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp |
| Status | ACTIVE |
| Body Inside Diameter | 3.500 INCHES NOMINAL 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 |
|---|---|
| 128C811AA-1 | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| KMC-128C811AA-1 PRIMARY | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| 128C811AAPC1 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
| 128CB11AAPC1 | C/1 Advisory reference — outside the item-of-supply concept General Electric Co Naval and Drive Turbine Systems Dept |
| 128C811AA-1 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
| 128C811AA-1 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 128C811AAPC1 | 5/9 Secondary reference Lowe Charles M Co the |
| 128C811AA P1 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
NSN 4810-01-033-5174 is a Seat,valve, manufactured by Krobach Mfg. Corp. Dba Krobach Manufacturing Corp, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-033-5174 has 2 manufacturer part numbers on file: 128C811AA-1 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), KMC-128C811AA-1 (Krobach Mfg. Corp. Dba Krobach Manufacturing Corp).
Key specifications for KMC-128C811AA-1: Body Inside Diameter: 3.500 INCHES NOMINAL IN. 1 specification is 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.