PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

408690Seat,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-320-8253 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-320-8253 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-320-8253. Primary manufacturer part number: 408690.
Features
  • Seat,valve — FSC 4820
  • 4 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-320-8253, 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. This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersCircor Intl Inc (CAGE 16626); Leslie Controls, Inc. Dba Leslie Controls Inc (CAGE 35795)
Technical Specifications
ParameterValue
NSN4820-01-320-8253
Primary Part Number408690
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
1270-00-757-6005408690 INTERCHANGEABLE
Resistor and Bracke
Raytheon Company Dba Raytheon
5985-01-209-21654151-140 INTERCHANGEABLE
Coupler,directional
Bird Electronic Corporation Div Bird Electronic Corp
4820-01-320-88582498-00-257 30IN VALVE ONLY INTERCHANGEABLE
Valve,butterfly
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-320-8893408799 INTERCHANGEABLE
Stem,fluid Valve
Leslie Controls, Inc. Dba Leslie Controls Inc
3120-01-321-2086408617 INTERCHANGEABLE
Bushing,sleeve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-321-6341408815 INTERCHANGEABLE
Stem,fluid Valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-321-6441408575 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
5910-01-396-5483408690 INTERCHANGEABLE
Capacitor,fixed,electrolytic
Fluke Corp
Cross-Reference Index
Part NumberManufacturer
2498-00-257 Circor Intl Inc (USA)
408690 Circor Intl Inc (USA)
2498-00-257 PC 13 Circor Intl Inc (USA)
408690 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
1270-00-757-6005INTERCHANGEABLE
RESISTOR AND BRACKE
408690
5985-01-209-2165INTERCHANGEABLE
COUPLER,DIRECTIONAL
4151-140
4820-01-320-8858INTERCHANGEABLE
VALVE,BUTTERFLY
2498-00-257 30IN VALVE ONLY
4820-01-320-8893INTERCHANGEABLE
STEM,FLUID VALVE
408799
3120-01-321-2086INTERCHANGEABLE
BUSHING,SLEEVE
408617
4820-01-321-6341INTERCHANGEABLE
STEM,FLUID VALVE
408815
4820-01-321-6441INTERCHANGEABLE
SEAT,VALVE
408575
5910-01-396-5483INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
408690

Frequently Asked Questions

What is NSN 4820-01-320-8253?

NSN 4820-01-320-8253 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 4820-01-320-8253?

NSN 4820-01-320-8253 has 4 cross-referenced part numbers: 2498-00-257 (Circor Intl Inc), 408690 (Circor Intl Inc), 2498-00-257 PC 13 (Circor Intl Inc), 408690 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-320-8253?

There are 8 known substitutes for 4820-01-320-8253: 1270-00-757-6005, 5985-01-209-2165, 4820-01-320-8858 and 5 more. Verify interchangeability with system specifications before substitution.

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