PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NB21059333Seat,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-00-474-0293 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-474-0293 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-474-0293. Primary manufacturer part number: NB21059333.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: FLAT
  • Style Designator: THREADED FLANGED
  • Under Flange Height: 0.453 INCHES NOMINAL IN
  • Body Inside Diameter: 0.250 INCHES NOMINAL IN
  • Flange Diameter: 1.125 INCHES NOMINAL IN
  • Flange Seat to Disk End Height: 0.438 INCHES NOMINAL IN
  • Material: STEEL CORROSION RESISTING OVERALL
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-474-0293, 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 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-474-0293
Primary Part NumberNB21059333
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Seating Surface ShapeFLAT
Style DesignatorTHREADED FLANGED
Under Flange Height0.453 INCHES NOMINAL IN
Body Inside Diameter0.250 INCHES NOMINAL IN
Flange Diameter1.125 INCHES NOMINAL IN
Flange Seat to Disk End Height0.438 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5133-00-227-5956 INTERCHANGEABLE
Drill,twist
5133-00-232-2868 INTERCHANGEABLE
Drill,twist
4320-00-398-839710593 INTERCHANGEABLE
Ring,wearing
Rps-Fl, Inc. Dba Rps Inc
2910-00-712-843910593 INTERCHANGEABLE
Parts Kit,engine Fuel Pump
Mcculloch Corp
5977-00-891-515210-5979 INTERCHANGEABLE
Brush Set,electrical Contact
Ametek Inc Lamb Electric Div
5935-00-985-5444HBL7940 INTERCHANGEABLE
Connector,receptacle,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
5950-01-029-08531219-101 INTERCHANGEABLE
Transformer,power
Bae Systems Information and Electronic Systems Integration Inc.
5310-01-257-5049 INTERCHANGEABLE
Washer,spring Tension
6625-01-440-840310593 INTERCHANGEABLE
Case,electrical-Electronic Test
Rice Lake Weighing Systems, Inc
5999-01-519-0222 INTERCHANGEABLE
Mounting Pad,electrical-Electron
Cross-Reference Index
Part NumberManufacturer
NB21059333 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
10593-3 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
210593-33 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
10593 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
PL-3758 PIECE 2 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
10593-33 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5133-00-227-5956INTERCHANGEABLE
DRILL,TWIST
5133-00-232-2868INTERCHANGEABLE
DRILL,TWIST
4320-00-398-8397INTERCHANGEABLE
RING,WEARING
10593
2910-00-712-8439INTERCHANGEABLE
PARTS KIT,ENGINE FUEL PUMP
10593
5977-00-891-5152INTERCHANGEABLE
BRUSH SET,ELECTRICAL CONTACT
10-5979
5935-00-985-5444INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
HBL7940
5950-01-029-0853INTERCHANGEABLE
TRANSFORMER,POWER
1219-101
5310-01-257-5049INTERCHANGEABLE
WASHER,SPRING TENSION
6625-01-440-8403INTERCHANGEABLE
CASE,ELECTRICAL-ELECTRONIC TEST
10593
5999-01-519-0222INTERCHANGEABLE
MOUNTING PAD,ELECTRICAL-ELECTRON

Frequently Asked Questions

What is NSN 4820-00-474-0293?

NSN 4820-00-474-0293 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 4820-00-474-0293?

NSN 4820-00-474-0293 has 6 cross-referenced part numbers: NB21059333 (Leslie Controls, Inc. Dba Leslie Controls Inc), 10593-3 (Leslie Controls, Inc. Dba Leslie Controls Inc), 210593-33 (Leslie Controls, Inc. Dba Leslie Controls Inc), 10593 (Leslie Controls, Inc. Dba Leslie Controls Inc), PL-3758 PIECE 2 (Leslie Controls, Inc. Dba Leslie Controls Inc) and 1 more.

What NSN replaces 4820-00-474-0293?

There are 10 known substitutes for 4820-00-474-0293: 5133-00-227-5956, 5133-00-232-2868, 4320-00-398-8397 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NB21059333?

Key specifications for NB21059333: Seating Surface Shape: FLAT; Style Designator: THREADED FLANGED; Under Flange Height: 0.453 INCHES NOMINAL IN; Body Inside Diameter: 0.250 INCHES NOMINAL IN. 7 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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