PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

41543Thermal Unit,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-00-803-5506 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-803-5506 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-803-5506. Primary manufacturer part number: 41543.
Features
  • Thermal Unit,valve — FSC 4820
  • General Characteristics Item Description: COPPER BELLOWS 0.562 IN. DIA BY 3.500 IN. LG,0.270 IN. DIA BY 120.0 IN. LG CAPILLARY TUBE W/PRECHARGED THERMAL BULB,0.625-18 UNF EXTERNAL BOSS MTG THD,1.750 IN. FROM MTG SHOULDER TO END OF BELLOWS IN
  • 2 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 Thermal Unit,valve, cataloged under National Stock Number 4820-00-803-5506, 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 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-803-5506
Primary Part Number41543
Item NameThermal Unit,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
General Characteristics Item DescriptionCOPPER BELLOWS 0.562 IN. DIA BY 3.500 IN. LG,0.270 IN. DIA BY 120.0 IN. LG CAPILLARY TUBE W/PRECHARGED THERMAL BULB,0.625-18 UNF EXTERNAL BOSS MTG THD,1.750 IN. FROM MTG SHOULDER TO END OF BELLOWS IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5330-00-285-839841543 INTERCHANGEABLE
Seal,plain Encased
Dressta North America Ltd
5310-00-528-30549A7884 INTERCHANGEABLE
Washer,split
Napco International Llc Dba Napco International Inc
3110-01-068-052141543 INTERCHANGEABLE
Bearing,ball,annular
Telemechanics Inc
5962-01-204-638841543 INTERCHANGEABLE
Microcircuit,memory
Raytheon Company Div Rmd Strategic
4820-01-218-2486010-500-0012 INTERCHANGEABLE
Seat,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
9540-01-296-912141543 INTERCHANGEABLE
Structural Section,special Shape
Aluminum Co of America
3040-01-478-697715098-41540 ITEM 3 INTERCHANGEABLE
Bracket,eye,rotating Shaft
Moog Inc. Dba Ampac-Isp Corp
5998-01-647-970641543 INTERCHANGEABLE
Circuit Card Assembly
Extreme Networks, Inc
Cross-Reference Index
Part NumberManufacturer
C0DE141-22-00-10 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
41543 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5330-00-285-8398INTERCHANGEABLE
SEAL,PLAIN ENCASED
41543
5310-00-528-3054INTERCHANGEABLE
WASHER,SPLIT
9A7884
3110-01-068-0521INTERCHANGEABLE
BEARING,BALL,ANNULAR
41543
5962-01-204-6388INTERCHANGEABLE
MICROCIRCUIT,MEMORY
41543
4820-01-218-2486INTERCHANGEABLE
SEAT,VALVE
010-500-0012
9540-01-296-9121INTERCHANGEABLE
STRUCTURAL SECTION,SPECIAL SHAPE
41543
3040-01-478-6977INTERCHANGEABLE
BRACKET,EYE,ROTATING SHAFT
15098-41540 ITEM 3
5998-01-647-9706INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
41543

Frequently Asked Questions

What is NSN 4820-00-803-5506?

NSN 4820-00-803-5506 is a Thermal Unit,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 4820-00-803-5506?

NSN 4820-00-803-5506 has 2 cross-referenced part numbers: C0DE141-22-00-10 (Leslie Controls, Inc. Dba Leslie Controls Inc), 41543 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-00-803-5506?

There are 8 known substitutes for 4820-00-803-5506: 5330-00-285-8398, 5310-00-528-3054, 3110-01-068-0521 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 41543?

Key specifications for 41543: General Characteristics Item Description: COPPER BELLOWS 0.562 IN. DIA BY 3.500 IN. LG,0.270 IN. DIA BY 120.0 IN. LG CAPILLARY TUBE W/PRECHARGED THERMAL BULB,0.625-18 UNF EXTERNAL BOSS MTG THD,1.750 IN. FROM MTG SHOULDER TO END OF BELLOWS IN. 1 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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