The Seat,valve, cataloged under National Stock Number 4820-01-378-5606, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Krobach Mfg. Corp. Dba Krobach Manufacturing Corp. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-378-5606 |
| Primary Part Number | KMC-60-649 PC 552 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING SEAT |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| KMC-60-649 PC 552 PRIMARY | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| 8573-000-063 | Velan Valve Corp. (USA) |
| 9999-001 PC 17 SZ 4IN | Velan Valve Corp. (USA) |
| 8573-000-418 PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 8573-000-013 | 5/9 Secondary reference Velan Valve Corp. |
| 7370-050 PC11 4.0IN | 5/9 Secondary reference Velan Valve Corp. |
NSN 4820-01-378-5606 is a Seat,valve, manufactured by Krobach Mfg. Corp. Dba Krobach Manufacturing Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-378-5606 has 4 manufacturer part numbers on file: KMC-60-649 PC 552 (Krobach Mfg. Corp. Dba Krobach Manufacturing Corp), 8573-000-063 (Velan Valve Corp.), 9999-001 PC 17 SZ 4IN (Velan Valve Corp.), 8573-000-418 (Velan Valve Corp.).
Key specifications for KMC-60-649 PC 552: Material: STEEL CORROSION RESISTING SEAT; Seating Surface Shape: FLAT. 2 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.