PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N12358Seat,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-00-336-9269 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-336-9269 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-336-9269. Primary manufacturer part number: N12358.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: FLAT
  • Under Flange Height: 0.296 INCHES NOMINAL IN
  • Style Designator: THREADED FLANGED
  • Thread Length: 0.218 INCHES NOMINAL SINGLE THREADED PORTION IN
  • Thread Series Designator: UNF SINGLE THREADED PORTION
  • Flange Seat to Disk End Height: 0.296 INCHES NOMINAL IN
  • Flange Diameter: 0.641 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-336-9269, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, 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
NSN4820-00-336-9269
Primary Part NumberN12358
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Seating Surface ShapeFLAT
Under Flange Height0.296 INCHES NOMINAL IN
Style DesignatorTHREADED FLANGED
Thread Length0.218 INCHES NOMINAL SINGLE THREADED PORTION IN
Thread Series DesignatorUNF SINGLE THREADED PORTION
Flange Seat to Disk End Height0.296 INCHES NOMINAL IN
Flange Diameter0.641 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Nominal Thread Size0.438 INCHES SINGLE THREADED PORTION IN
Thread Class2A SINGLE THREADED PORTION A
Body Inside Diameter0.234 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-036-1544N12353 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4320-00-130-0240H2BB100 INTERCHANGEABLE
Pump,rotary
Suntec Industries Inc Del Dba Suntec
5330-00-135-363412353 INTERCHANGEABLE
Gasket
Aerosonic Llc
5330-00-163-877012353 INTERCHANGEABLE
Retainer,seal
Dressta North America Ltd
5133-00-232-6399 INTERCHANGEABLE
Drill,twist
4730-00-277-5543 INTERCHANGEABLE
Elbow,pipe
5935-00-549-286212353 INTERCHANGEABLE
Connector,receptacle,electrical
Raytheon Company Dba Raytheon Co
5330-00-691-0659 INTERCHANGEABLE
Seal,plain Encased
2910-00-788-098612358 INTERCHANGEABLE
Link Fuel Injection
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5133-00-988-5695 INTERCHANGEABLE
Drill,twist
Cross-Reference Index
Part NumberManufacturer
N12358 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
12353 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
12358 Lineta Engineering Und Handelsgesell-Schaft Mbh (DEU)
12358 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-00-036-1544INTERCHANGEABLE
SEAT,VALVE
N12353
4320-00-130-0240INTERCHANGEABLE
PUMP,ROTARY
H2BB100
5330-00-135-3634INTERCHANGEABLE
GASKET
12353
5330-00-163-8770INTERCHANGEABLE
RETAINER,SEAL
12353
5133-00-232-6399INTERCHANGEABLE
DRILL,TWIST
4730-00-277-5543INTERCHANGEABLE
ELBOW,PIPE
5935-00-549-2862INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
12353
5330-00-691-0659INTERCHANGEABLE
SEAL,PLAIN ENCASED
2910-00-788-0986INTERCHANGEABLE
LINK FUEL INJECTION
12358
5133-00-988-5695INTERCHANGEABLE
DRILL,TWIST
3010-00-998-7337INTERCHANGEABLE
GEARCASE-MOTOR
3120-01-130-1019INTERCHANGEABLE
BEARING,SLEEVE

Frequently Asked Questions

What is NSN 4820-00-336-9269?

NSN 4820-00-336-9269 is a Seat,valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-336-9269?

NSN 4820-00-336-9269 has 4 cross-referenced part numbers: N12358 (Leslie Controls, Inc. Dba Leslie Controls Inc), 12353 (Leslie Controls, Inc. Dba Leslie Controls Inc), 12358 (Lineta Engineering Und Handelsgesell-Schaft Mbh), 12358 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-00-336-9269?

There are 12 known substitutes for 4820-00-336-9269: 4820-00-036-1544, 4320-00-130-0240, 5330-00-135-3634 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N12358?

Key specifications for N12358: Seating Surface Shape: FLAT; Under Flange Height: 0.296 INCHES NOMINAL IN; Style Designator: THREADED FLANGED; Thread Length: 0.218 INCHES NOMINAL SINGLE THREADED PORTION IN. 11 total characteristics are documented in the Federal Logistics Information System.

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