PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1-27Seat,valve

Chicago Faucet Co the · NSN 4820-01-257-6789 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-257-6789 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-257-6789. Primary manufacturer part number: 1-27.
Features
  • Seat,valve — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Chicago Faucet Co the
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-257-6789, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Chicago Faucet Co the. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersChicago Faucet Co the (CAGE 96165)
Technical Specifications
ParameterValue
NSN4820-01-257-6789
Primary Part Number1-27
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerChicago Faucet Co the
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-036-25502180 INTERCHANGEABLE
Regulator,thermostatic Temperatu
Velan Valve Corp.
5950-00-228-826223996 INTERCHANGEABLE
Coil,radio Frequency
Viking Technologies, Ltd.
5360-00-342-0075W2193 INTERCHANGEABLE
Spring,helical,compression
Emerson Electric Co Alco Controls Div
5985-00-455-44878491B-003 INTERCHANGEABLE
Attenuator,fixed
Keysight Technologies Inc
3030-00-528-4448 INTERCHANGEABLE
Belt,v
5340-00-550-84852193 INTERCHANGEABLE
Bumper
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5930-00-581-46119000S6202-74290 TYPE S3JR25-3A INTERCHANGEABLE
Switch,rotary
Naval Ship Systems Command
5950-00-858-82909016661 INTERCHANGEABLE
Transformer,electrical
Us Army Aviation and Missile Command
5450-01-084-0548BLG10A-8FT INTERCHANGEABLE
Bleacher,portable
Kay Park-Rec Corporation Dba Kay Park Rec Corp Div Kay Park-Rec Corp.
6670-01-145-81162-193 INTERCHANGEABLE
Scale,weighing
Fps Food Processing System, Inc
Cross-Reference Index
Part NumberManufacturer
1-27 PRIMARY Chicago Faucet Co the (USA)
219-3 Chicago Faucet Co the (USA)
Related Parts
4820-00-036-2550INTERCHANGEABLE
REGULATOR,THERMOSTATIC TEMPERATU
2180
5950-00-228-8262INTERCHANGEABLE
COIL,RADIO FREQUENCY
23996
5360-00-342-0075INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
W2193
5985-00-455-4487INTERCHANGEABLE
ATTENUATOR,FIXED
8491B-003
3030-00-528-4448INTERCHANGEABLE
BELT,V
5340-00-550-8485INTERCHANGEABLE
BUMPER
2193
5930-00-581-4611INTERCHANGEABLE
SWITCH,ROTARY
9000S6202-74290 TYPE S3JR25-3A
5950-00-858-8290INTERCHANGEABLE
TRANSFORMER,ELECTRICAL
9016661
5450-01-084-0548INTERCHANGEABLE
BLEACHER,PORTABLE
BLG10A-8FT
6670-01-145-8116INTERCHANGEABLE
SCALE,WEIGHING
2-193
3010-01-151-8853INTERCHANGEABLE
ROD,PUSH,DECLUTCH
6145-01-165-7704INTERCHANGEABLE
BRAID,WIRE

Frequently Asked Questions

What is NSN 4820-01-257-6789?

NSN 4820-01-257-6789 is a Seat,valve, manufactured by Chicago Faucet Co the, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-257-6789?

NSN 4820-01-257-6789 has 2 cross-referenced part numbers: 1-27 (Chicago Faucet Co the), 219-3 (Chicago Faucet Co the).

What NSN replaces 4820-01-257-6789?

There are 12 known substitutes for 4820-01-257-6789: 4820-00-036-2550, 5950-00-228-8262, 5360-00-342-0075 and 9 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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