PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

584-1-1 1-4PC4Seat,valve

Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc · NSN 4820-01-057-6257 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-057-6257 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-057-6257. Primary manufacturer part number: 584-1-1 1-4PC4.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: FLAT
  • Style Designator: PLAIN FLANGED
  • Body Inside Diameter: 1.067 INCHES NOMINAL IN
  • Material: NICKEL ALLOY OVERALL
  • 3 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
  • Applications requiring Nickel Alloy Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-057-6257, 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. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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.

Technical Specifications
ParameterValue
NSN4820-01-057-6257
Primary Part Number584-1-1 1-4PC4
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMilwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
StatusACTIVE
Seating Surface ShapeFLAT
Style DesignatorPLAIN FLANGED
Body Inside Diameter1.067 INCHES NOMINAL IN
MaterialNICKEL ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6685-00-027-717235-1009-SW-02B-XFW-0/5000LB INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
5960-00-262-0213 INTERCHANGEABLE
Electron Tube
5365-00-489-28355841-5 INTERCHANGEABLE
Ring,externally Threaded
Goodrich Aerospace Canada Ltd
2520-00-496-1605 INTERCHANGEABLE
Transmission Case
5950-00-648-40117485510P1 INTERCHANGEABLE
Transformer,power
Lockheed Martin Corporation Div Rms
5960-00-819-1154 INTERCHANGEABLE
Electron Tube
6685-00-913-0533132677 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
5910-01-043-6899 INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
5950-01-081-0215517600-1 INTERCHANGEABLE
Transformer,power
Naval Air Warfare Center Aircraft Division Joint Base Jbmdl
4820-01-113-9242584-1-112 INTERCHANGEABLE
Valve,globe
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Cross-Reference Index
Part NumberManufacturer
51158G Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
584-1 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
584-1-1 1-4PC4 PRIMARY Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
Related Parts
6685-00-027-7172INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
35-1009-SW-02B-XFW-0/5000LB
5960-00-262-0213INTERCHANGEABLE
ELECTRON TUBE
5365-00-489-2835INTERCHANGEABLE
RING,EXTERNALLY THREADED
5841-5
2520-00-496-1605INTERCHANGEABLE
TRANSMISSION CASE
5950-00-648-4011INTERCHANGEABLE
TRANSFORMER,POWER
7485510P1
5960-00-819-1154INTERCHANGEABLE
ELECTRON TUBE
6685-00-913-0533INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
132677
5910-01-043-6899INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
5950-01-081-0215INTERCHANGEABLE
TRANSFORMER,POWER
517600-1
4820-01-113-9242INTERCHANGEABLE
VALVE,GLOBE
584-1-112
5365-01-522-1471INTERCHANGEABLE
PLUG,MACHINE THREAD
5841
5365-01-552-5611INTERCHANGEABLE
CABLE RET DEVICE

Frequently Asked Questions

What is NSN 4820-01-057-6257?

NSN 4820-01-057-6257 is a Seat,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-057-6257?

NSN 4820-01-057-6257 has 3 cross-referenced part numbers: 51158G (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 584-1 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 584-1-1 1-4PC4 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).

What NSN replaces 4820-01-057-6257?

There are 12 known substitutes for 4820-01-057-6257: 6685-00-027-7172, 5960-00-262-0213, 5365-00-489-2835 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 584-1-1 1-4PC4?

Key specifications for 584-1-1 1-4PC4: Seating Surface Shape: FLAT; Style Designator: PLAIN FLANGED; Body Inside Diameter: 1.067 INCHES NOMINAL IN; Material: NICKEL ALLOY OVERALL. 4 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