NSN 4820-01-201-2705 · NIIN 012012705 · Part number 7794-2.50IN-8
William E Williams Valve Corp · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 79342
Government record, cited
NSN 4820-01-201-2705 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-201-2705. Manufacturer of record part number: 7794-2.50IN-8.
Manufacturer of record: William E Williams Valve Corp
Identification
NSN: 4820-01-201-2705
NIIN: 012012705
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 7794-2.50IN-8
Manufacturer: William E Williams Valve Corp
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-201-2705, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William E Williams Valve Corp. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-201-2705
Primary Part Number
7794-2.50IN-8
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
William E Williams Valve Corp
Status
ACTIVE
Material
STEEL SEAT
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-218-37177794 5IN PIECE 2POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)William E Williams Valve Corp
4820-01-222-02607794 5IN PIECE 8POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)William E Williams Valve Corp
4820-01-446-6813151F1 3INPOSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)William E Williams Valve Corp
NSN 4820-01-201-2705 is a Seat,valve, manufactured by William E Williams Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-201-2705?
NSN 4820-01-201-2705 has 1 manufacturer part number on file: 7794-2.50IN-8 (William E Williams Valve Corp).
What NSN replaces 4820-01-201-2705?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-218-3717, 4820-01-222-0260, 4820-01-446-6813. Verify interchangeability with system specifications before substitution.
What are the specifications of 7794-2.50IN-8?
Key specifications for 7794-2.50IN-8: Material: STEEL SEAT. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-201-2705 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.