The Seat,valve, cataloged under National Stock Number 4820-01-195-1893, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Energy, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-195-1893 |
| Primary Part Number | GR-1744A |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Material | STEEL COMP 8615 OVERALL |
| 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 |
|---|---|
| GR-1744A PRIMARY | Siemens Energy, Inc. (USA) |
| H-2878 PIECE 35 | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| H-2878 | D/9 Drawing number reference only Siemens Energy, Inc. |
NSN 4820-01-195-1893 is a Seat,valve, manufactured by Siemens Energy, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-195-1893 has 2 manufacturer part numbers on file: GR-1744A (Siemens Energy, Inc.), H-2878 PIECE 35 (Siemens Energy, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-196-1197. Verify interchangeability with system specifications before substitution.
Key specifications for GR-1744A: Material: STEEL COMP 8615 OVERALL. 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.