PartsTable TECHNICAL DATA SHEET
SEPTEMBER 2026Technical Data Sheet

229-649-45Seat,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-252-2630 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-252-2630 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-252-2630. Primary manufacturer part number: 229-649-45.
Features
  • Seat,valve — FSC 4820
  • Style Designator: PLAIN THREADED
  • Thread Series Designator: UNS SINGLE THREADED PORTION
  • Material: NICKEL ALLOY BODY
  • Nominal Thread Size: 1.625 INCHES SINGLE THREADED PORTION IN
  • Body Inside Diameter: 1.250 INCHES NOMINAL IN
  • Thread Length: 0.219 INCHES NOMINAL SINGLE THREADED PORTION IN
  • Thread Class: 2A SINGLE THREADED PORTION A
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy Body construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-252-2630, 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-252-2630
Primary Part Number229-649-45
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Style DesignatorPLAIN THREADED
Thread Series DesignatorUNS SINGLE THREADED PORTION
MaterialNICKEL ALLOY BODY
Nominal Thread Size1.625 INCHES SINGLE THREADED PORTION IN
Body Inside Diameter1.250 INCHES NOMINAL IN
Thread Length0.219 INCHES NOMINAL SINGLE THREADED PORTION IN
Thread Class2A SINGLE THREADED PORTION A
Seating Surface ShapeO-RING
Thread Quantity Per Inch14 SINGLE THREADED PORTION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
⇄ Verified Substitutes 5
4820-00-733-511411548U2U045K INTERCHANGEABLE
Valve,regulating,fluid Pressure
Grove Valve Operations
4470-00-951-5042 INTERCHANGEABLE
Ball,relief
4820-01-139-9886N22964942 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-251-7707YB2326F292 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-251-7769NB22964743 INTERCHANGEABLE
Stem,fluid Valve
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
229-649-45 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
22964942 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N-730 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N-730 PIECE 15 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-00-733-5114INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
11548U2U045K
4470-00-951-5042INTERCHANGEABLE
BALL,RELIEF
4820-01-139-9886INTERCHANGEABLE
SEAT,VALVE
N22964942
4820-01-251-7707INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
YB2326F292
4820-01-251-7769INTERCHANGEABLE
STEM,FLUID VALVE
NB22964743

Frequently Asked Questions

What is NSN 4820-01-252-2630?

NSN 4820-01-252-2630 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 4820-01-252-2630?

NSN 4820-01-252-2630 has 4 cross-referenced part numbers: 229-649-45 (Leslie Controls, Inc. Dba Leslie Controls Inc), 22964942 (Leslie Controls, Inc. Dba Leslie Controls Inc), N-730 (Leslie Controls, Inc. Dba Leslie Controls Inc), N-730 PIECE 15 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-252-2630?

There are 5 known substitutes for 4820-01-252-2630: 4820-00-733-5114, 4470-00-951-5042, 4820-01-139-9886 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 229-649-45?

Key specifications for 229-649-45: Style Designator: PLAIN THREADED; Thread Series Designator: UNS SINGLE THREADED PORTION; Material: NICKEL ALLOY BODY; Nominal Thread Size: 1.625 INCHES SINGLE THREADED PORTION IN. 10 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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