PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C595CSeat,valve

Kieley and Mueller Inc Sub of Johnson Controls Inc · NSN 4820-00-956-3006 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-956-3006 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-956-3006. Primary manufacturer part number: C595C.
Features
  • Seat,valve — FSC 4820
  • Style Designator: THREADED FLANGED
  • Material: NICKEL ALLOY OVERALL
  • Thread Length: 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN
  • Under Flange Height: 0.687 INCHES NOMINAL IN
  • Seating Surface Shape: FLAT
  • Flange Diameter: 3.718 INCHES NOMINAL IN
  • Nominal Thread Size: 3.500 INCHES SINGLE THREADED PORTION IN
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 4820-00-956-3006, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Kieley and Mueller Inc Sub of Johnson Controls Inc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-956-3006
Primary Part NumberC595C
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerKieley and Mueller Inc Sub of Johnson Controls Inc
StatusCANCELLED
Style DesignatorTHREADED FLANGED
MaterialNICKEL ALLOY OVERALL
Thread Length0.312 INCHES NOMINAL SINGLE THREADED PORTION IN
Under Flange Height0.687 INCHES NOMINAL IN
Seating Surface ShapeFLAT
Flange Diameter3.718 INCHES NOMINAL IN
Nominal Thread Size3.500 INCHES SINGLE THREADED PORTION IN
Thread Series DesignatorUN SINGLE THREADED PORTION
Body Inside Diameter3.000 INCHES NOMINAL IN
Thread Quantity Per Inch16 SINGLE THREADED PORTION
Thread Class3A SINGLE THREADED PORTION A
Flange Seat to Disk End Height0.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5342-01-234-7361B-14-05-0002 INTERCHANGEABLE
Bracket,hinge Link
Todd Combustion Inc
5998-01-579-7211B1452 INTERCHANGEABLE
Media Converter
Lockheed Martin Corporation Div Rms - Manassas
Cross-Reference Index
Part NumberManufacturer
C595C Kieley and Mueller Inc Sub of Johnson Controls Inc (USA)
B1452 Kieley and Mueller Inc Sub of Johnson Controls Inc (USA)
Related Parts
5342-01-234-7361INTERCHANGEABLE
BRACKET,HINGE LINK
B-14-05-0002
5998-01-579-7211INTERCHANGEABLE
MEDIA CONVERTER
B1452

Frequently Asked Questions

What is NSN 4820-00-956-3006?

NSN 4820-00-956-3006 is a Seat,valve, manufactured by Kieley and Mueller Inc Sub of Johnson Controls Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-956-3006?

NSN 4820-00-956-3006 has 2 cross-referenced part numbers: C595C (Kieley and Mueller Inc Sub of Johnson Controls Inc), B1452 (Kieley and Mueller Inc Sub of Johnson Controls Inc).

What NSN replaces 4820-00-956-3006?

There are 2 known substitutes for 4820-00-956-3006: 5342-01-234-7361, 5998-01-579-7211. Verify interchangeability with system specifications before substitution.

What are the specifications of C595C?

Key specifications for C595C: Style Designator: THREADED FLANGED; Material: NICKEL ALLOY OVERALL; Thread Length: 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN; Under Flange Height: 0.687 INCHES NOMINAL IN. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-956-3006 still in active supply?

NSN 4820-00-956-3006 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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