PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25690Valve,vacuum Breaking

Liquid Metronics Inc · NSN 4820-01-346-4660 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-346-4660 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-346-4660. Primary manufacturer part number: 25690.
Features
  • Valve,vacuum Breaking — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Liquid Metronics Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,vacuum Breaking, cataloged under National Stock Number 4820-01-346-4660, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Liquid Metronics Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-346-4660
Primary Part Number25690
Item NameValve,vacuum Breaking
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLiquid Metronics Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5950-00-648-255925690 INTERCHANGEABLE
Reactor
Freed Transformer Co
4310-00-715-567325690 INTERCHANGEABLE
Connector
Hdt Expeditionary Systems Inc
5325-01-037-538411119 INTERCHANGEABLE
Ring,retaining
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
Cross-Reference Index
Part NumberManufacturer
25690 PRIMARY Liquid Metronics Inc (USA)
Related Parts
5950-00-648-2559INTERCHANGEABLE
REACTOR
25690
4310-00-715-5673INTERCHANGEABLE
CONNECTOR
25690
5325-01-037-5384INTERCHANGEABLE
RING,RETAINING
11119

Frequently Asked Questions

What is NSN 4820-01-346-4660?

NSN 4820-01-346-4660 is a Valve,vacuum Breaking, manufactured by Liquid Metronics Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-346-4660?

NSN 4820-01-346-4660 has 1 cross-referenced part number: 25690 (Liquid Metronics Inc).

What NSN replaces 4820-01-346-4660?

There are 3 known substitutes for 4820-01-346-4660: 5950-00-648-2559, 4310-00-715-5673, 5325-01-037-5384. Verify interchangeability with system specifications before substitution.

What are the specifications of 25690?

Key specifications for 25690: End Item Identification: 4610-01-219-8707. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com