NSN 4820-01-108-6419 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-108-6419. Manufacturer of record part number: 256121 PIECE 2.
Manufacturer of record: Huntington Ingalls Inc Div Newport News Shipbuilding
Identification
NSN: 4820-01-108-6419
NIIN: 011086419
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 256121 PIECE 2
Manufacturer: Huntington Ingalls Inc Div Newport News Shipbuilding
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-108-6419, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-108-6419
Primary Part Number
256121 PIECE 2
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Huntington Ingalls Inc Div Newport News Shipbuilding
Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
Reference documents
Reference
Meaning
258232 PIECE NO.6
5/1Secondary reference
Huntington Ingalls Inc Div Newport News Shipbuilding
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-108-6419?
NSN 4820-01-108-6419 is a Seat,valve, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-108-6419?
NSN 4820-01-108-6419 has 1 manufacturer part number on file: 256121 PIECE 2 (Huntington Ingalls Inc Div Newport News Shipbuilding).
What are the specifications of 256121 PIECE 2?
Key specifications for 256121 PIECE 2: End Item Identification: VALVE B 3WAY 1.50IPS FLGE COPNI. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-108-6419 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.