PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21509NPC11Stem,fluid Valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-544-3262 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-544-3262 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-544-3262. Primary manufacturer part number: 21509NPC11.
Features
  • Stem,fluid Valve — FSC 4820
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATION
  • 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 Stem,fluid Valve, cataloged under National Stock Number 4820-01-544-3262, 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 2 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-544-3262
Primary Part Number21509NPC11
Item NameStem,fluid Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5331-01-077-9759N0398 2-130 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
4820-01-278-6225N23949 INTERCHANGEABLE
Stem,fluid Valve
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
21509NPC11 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
21509NPC11L1 Naval Inventory Control Point Mechanicsburg (USA)
23949L1 Naval Inventory Control Point Mechanicsburg (USA)
23949 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5331-01-077-9759INTERCHANGEABLE
O-RING
N0398 2-130
4820-01-278-6225INTERCHANGEABLE
STEM,FLUID VALVE
N23949

Frequently Asked Questions

What is NSN 4820-01-544-3262?

NSN 4820-01-544-3262 is a Stem,fluid 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 4820-01-544-3262?

NSN 4820-01-544-3262 has 4 cross-referenced part numbers: 21509NPC11 (Leslie Controls, Inc. Dba Leslie Controls Inc), 21509NPC11L1 (Naval Inventory Control Point Mechanicsburg), 23949L1 (Naval Inventory Control Point Mechanicsburg), 23949 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-544-3262?

There are 2 known substitutes for 4820-01-544-3262: 5331-01-077-9759, 4820-01-278-6225. Verify interchangeability with system specifications before substitution.

What are the specifications of 21509NPC11?

Key specifications for 21509NPC11: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATION. 2 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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