NSN 4820-01-149-7863 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-149-7863. Manufacturer of record part number: H-2257 PC 108 AND PC 109.
Also searched as4820-01-149-7863 ·
4820011497863 ·
NIIN 011497863 ·
01-149-7863 ·
FSC 4820 Valves, Nonpowered · CAGE 16712 · H-2257 PC 108 AND PC 109 · M1802GWX1 AND M1825CKX1 · H-2257
The Piston,valve, cataloged under National Stock Number 4820-01-149-7863, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Energy, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Piston,valve
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Manufacturers
Siemens Energy, Inc. (CAGE 16712)
Technical Specifications
Parameter
Value
NSN
4820-01-149-7863
Primary Part Number
H-2257 PC 108 AND PC 109
Item Name
Piston,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Siemens Energy, Inc.
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-150-0905M1847BSPOSSIBLE MATCH
BLOCK,TRANSMITTER,VALVE
Possible match (shared part number)Siemens Energy, Inc.
4820-01-150-3699M237APPOSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Siemens Energy, Inc.
4820-01-150-3700M-1800CPX1POSSIBLE MATCH
CYLINDER,VALVE
Possible match (shared part number)Siemens Energy, Inc.
4820-01-150-5416H-2257 PIECE 32POSSIBLE MATCH
CYLINDER,VALVE
Possible match (shared part number)Siemens Energy, Inc.
4820-01-151-2629M1802GWANDM1825CKPOSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Siemens Energy, Inc.
4820-01-157-3540M1802HDPOSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Siemens Energy, Inc.
NSN 4820-01-149-7863 is a Piston,valve, manufactured by Siemens Energy, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-149-7863?
NSN 4820-01-149-7863 has 2 manufacturer part numbers on file: H-2257 PC 108 AND PC 109 (Siemens Energy, Inc.), M1802GWX1 AND M1825CKX1 (Siemens Energy, Inc.).
What NSN replaces 4820-01-149-7863?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-150-0905, 4820-01-150-3699, 4820-01-150-3700. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-149-7863 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.