PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4320-U-180Disk,valve

Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc · NSN 4820-01-566-5315 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-566-5315 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-566-5315. Primary manufacturer part number: 4320-U-180.
Features
  • Disk,valve — FSC 4820
  • 8 verified cross-references
  • Primary manufacturer: Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-566-5315, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. This item has 8 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameDisk,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersMilwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (CAGE 76364)
Technical Specifications
ParameterValue
NSN4820-01-566-5315
Primary Part Number4320-U-180
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMilwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5940-00-939-7842 INTERCHANGEABLE
Terminal,stud
5305-00-995-70914320 INTERCHANGEABLE
Screw,shoulder
Roller Bearing Co of America, Inc Div Pic Design
5306-01-154-8095458-56181-1 INTERCHANGEABLE
Bolt,main Landing Gear
The Boeing Company Div Defense
4820-01-414-79392365-U-160 INTERCHANGEABLE
Cap,valve
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Cross-Reference Index
Part NumberManufacturer
1305-022 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
4320-U Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
4320-U-180 PRIMARY Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
1305-022 ITEM 9 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
1305 8.00IN ITEM 6 PRIMARY Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
4320-U-183 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
458-56181-1 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
4320-UP-183 PRIMARY Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
Related Parts
5940-00-939-7842INTERCHANGEABLE
TERMINAL,STUD
5305-00-995-7091INTERCHANGEABLE
SCREW,SHOULDER
4320
5306-01-154-8095INTERCHANGEABLE
BOLT,MAIN LANDING GEAR
458-56181-1
4820-01-414-7939INTERCHANGEABLE
CAP,VALVE
2365-U-160

Frequently Asked Questions

What is NSN 4820-01-566-5315?

NSN 4820-01-566-5315 is a Disk,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-566-5315?

NSN 4820-01-566-5315 has 8 cross-referenced part numbers: 1305-022 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 4320-U (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 4320-U-180 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 1305-022 ITEM 9 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 1305 8.00IN ITEM 6 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc) and 3 more.

What NSN replaces 4820-01-566-5315?

There are 4 known substitutes for 4820-01-566-5315: 5940-00-939-7842, 5305-00-995-7091, 5306-01-154-8095 and 1 more. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-566-5315 still in active supply?

NSN 4820-01-566-5315 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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