PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N5643803Cap,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-227-2056 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-227-2056 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-227-2056. Primary manufacturer part number: N5643803.
Features
  • Cap,valve — FSC 4820
  • Valve Model Number for Which Designed: PTHNS-5
  • Valve Type for Which Designed: FLUID PRESSURE REGULATING
  • Material: STEEL
  • Attachment Method: BOLTS
  • Valve Size for Which Designed: 0.500 INCHES IN
  • 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
  • Applications requiring Steel construction
General Description

The Cap,valve, cataloged under National Stock Number 4820-01-227-2056, 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 5 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-227-2056
Primary Part NumberN5643803
Item NameCap,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Valve Model Number for Which DesignedPTHNS-5
Valve Type for Which DesignedFLUID PRESSURE REGULATING
MaterialSTEEL
Attachment MethodBOLTS
Valve Size for Which Designed0.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4310-00-288-12288229 INTERCHANGEABLE
Ring,piston
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
4320-00-824-2150Y501829105 INTERCHANGEABLE
Governor,pump,pressure Regulatin
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-149-34605643803 INTERCHANGEABLE
Cap,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
21886N Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
21886N PIECE 39 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N5643803 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
56438-03 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4310-00-288-1228INTERCHANGEABLE
RING,PISTON
8229
4320-00-824-2150INTERCHANGEABLE
GOVERNOR,PUMP,PRESSURE REGULATIN
Y501829105
4820-01-149-3460INTERCHANGEABLE
CAP,VALVE
5643803

Frequently Asked Questions

What is NSN 4820-01-227-2056?

NSN 4820-01-227-2056 is a Cap,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 4820-01-227-2056?

NSN 4820-01-227-2056 has 4 cross-referenced part numbers: 21886N (Leslie Controls, Inc. Dba Leslie Controls Inc), 21886N PIECE 39 (Leslie Controls, Inc. Dba Leslie Controls Inc), N5643803 (Leslie Controls, Inc. Dba Leslie Controls Inc), 56438-03 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-227-2056?

There are 3 known substitutes for 4820-01-227-2056: 4310-00-288-1228, 4320-00-824-2150, 4820-01-149-3460. Verify interchangeability with system specifications before substitution.

What are the specifications of N5643803?

Key specifications for N5643803: Valve Model Number for Which Designed: PTHNS-5; Valve Type for Which Designed: FLUID PRESSURE REGULATING; Material: STEEL; Attachment Method: BOLTS. 5 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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