PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NC21758742Seat,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-269-4752 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-269-4752 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-269-4752. Primary manufacturer part number: NC21758742.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: FLAT
  • Style Designator: THREADED FLANGED
  • Material: NICKEL ALLOY OVERALL
  • Under Flange Height: 0.188 INCHES NOMINAL IN
  • Body Inside Diameter: 1.516 INCHES NOMINAL IN
  • Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN
  • Flange Diameter: 2.000 INCHES NOMINAL 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 4820-01-269-4752, 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 9 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-269-4752
Primary Part NumberNC21758742
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusCANCELLED
Seating Surface ShapeFLAT
Style DesignatorTHREADED FLANGED
MaterialNICKEL ALLOY OVERALL
Under Flange Height0.188 INCHES NOMINAL IN
Body Inside Diameter1.516 INCHES NOMINAL IN
Flange Seat to Disk End Height0.125 INCHES NOMINAL IN
Flange Diameter2.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
4820-01-207-961140401-408 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-268-8655NB32966279 INTERCHANGEABLE
Diaphragm,valve,flat
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-268-9842YB2310G223 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-383-5331N-580 5 T 30 PSI INTERCHANGEABLE
Valve,regulating,fluid Pressure
Leslie Controls, Inc. Dba Leslie Controls Inc
6515-01-645-6988N731 INTERCHANGEABLE
Hydrocolloid Temp
Neotech Products Inc
6810-01-645-9954N580 INTERCHANGEABLE
Ribonucleic Acid
Amresco Inc.
Cross-Reference Index
Part NumberManufacturer
N-580 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
217-587-45 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
NC21758742 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
17587-42 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N-731 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N-731 PC 15 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
21758742 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
NB21758742 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N-580 PC 15 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-01-207-9611INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
40401-408
4820-01-268-8655INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
NB32966279
4820-01-268-9842INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
YB2310G223
4820-01-383-5331INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
N-580 5 T 30 PSI
6515-01-645-6988INTERCHANGEABLE
HYDROCOLLOID TEMP
N731
6810-01-645-9954INTERCHANGEABLE
RIBONUCLEIC ACID
N580

Frequently Asked Questions

What is NSN 4820-01-269-4752?

NSN 4820-01-269-4752 is a Seat,valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-269-4752?

NSN 4820-01-269-4752 has 9 cross-referenced part numbers: N-580 (Leslie Controls, Inc. Dba Leslie Controls Inc), 217-587-45 (Leslie Controls, Inc. Dba Leslie Controls Inc), NC21758742 (Leslie Controls, Inc. Dba Leslie Controls Inc), 17587-42 (Leslie Controls, Inc. Dba Leslie Controls Inc), N-731 (Leslie Controls, Inc. Dba Leslie Controls Inc) and 4 more.

What NSN replaces 4820-01-269-4752?

There are 6 known substitutes for 4820-01-269-4752: 4820-01-207-9611, 4820-01-268-8655, 4820-01-268-9842 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NC21758742?

Key specifications for NC21758742: Seating Surface Shape: FLAT; Style Designator: THREADED FLANGED; Material: NICKEL ALLOY OVERALL; Under Flange Height: 0.188 INCHES NOMINAL IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-269-4752 still in active supply?

NSN 4820-01-269-4752 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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