PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

L20WHeater,water,liquid Fuel

Aldrico, Inc. Dba Aldrich Company · NSN 4410-01-187-7138 · FSC 4410 · No Item Name Available
Verified by PartsTable
NSN 4410-01-187-7138 — this item is cataloged by the U.S. Government under National Stock Number 4410-01-187-7138. Primary manufacturer part number: L20W.
Features
  • Heater,water,liquid Fuel — FSC 4410
  • General Characteristics Item Description: OIL FIRED BOILER UNIT,STANDARD,NET RATING WATER BTU/HR 172; GROSS OUTPUT BTU/HR 198; FIRING RATE 2.0 GPH; 30 PSI WP,ROUND STEEL JACKET,45.875 IN.H,25.000 IN.DIA IN
  • 2 verified cross-references
  • Primary manufacturer: Aldrico, Inc. Dba Aldrich Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,water,liquid Fuel, cataloged under National Stock Number 4410-01-187-7138, is classified within Federal Supply Class 4410 (No Item Name Available) of the Furnace, Steam, Drying, Nuclear Reactors group. The primary manufacturer of record is Aldrico, Inc. Dba Aldrich Company. 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4410-01-187-7138
Primary Part NumberL20W
Item NameHeater,water,liquid Fuel
FSC / FSG4410 / 44 — No Item Name Available
ManufacturerAldrico, Inc. Dba Aldrich Company
StatusACTIVE
General Characteristics Item DescriptionOIL FIRED BOILER UNIT,STANDARD,NET RATING WATER BTU/HR 172; GROSS OUTPUT BTU/HR 198; FIRING RATE 2.0 GPH; 30 PSI WP,ROUND STEEL JACKET,45.875 IN.H,25.000 IN.DIA IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
6635-00-182-7534L20 INTERCHANGEABLE
Tester,spring Resiliency
Ametek Inc
5330-00-285-83990606910-8 INTERCHANGEABLE
Seal,plain Encased
New Holland Construction
5340-00-426-0568L20 INTERCHANGEABLE
Grip,handle
Superior Equipment Co Buckeye Div
3110-00-554-3941177003-107 INTERCHANGEABLE
Bearing,ball,annular
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5340-00-598-8041H14 INTERCHANGEABLE
Strap,retaining
Minerallac Electric Co
3110-00-823-8563A203242 INTERCHANGEABLE
Bearing,ball,linear Motion
Thomson Industries Inc
5355-00-989-5792LG-020 INTERCHANGEABLE
Dial,control
Ametek Inc
7690-01-158-3811L20R INTERCHANGEABLE
Marker,identification
American Labelmark Company Div Labelmaster
2805-01-278-4100L20 INTERCHANGEABLE
Crankshaft,engine
Emglo Products Corp
5996-01-626-3598L20 INTERCHANGEABLE
Amplifier,audio Frequency
Instruments Incorporated Dba Instruments Inc
Cross-Reference Index
Part NumberManufacturer
L20W Aldrico, Inc. Dba Aldrich Company (USA)
L-20 Aldrico, Inc. Dba Aldrich Company (USA)
Related Parts
6635-00-182-7534INTERCHANGEABLE
TESTER,SPRING RESILIENCY
L20
5330-00-285-8399INTERCHANGEABLE
SEAL,PLAIN ENCASED
0606910-8
5340-00-426-0568INTERCHANGEABLE
GRIP,HANDLE
L20
3110-00-554-3941INTERCHANGEABLE
BEARING,BALL,ANNULAR
177003-107
5340-00-598-8041INTERCHANGEABLE
STRAP,RETAINING
H14
3110-00-823-8563INTERCHANGEABLE
BEARING,BALL,LINEAR MOTION
A203242
5355-00-989-5792INTERCHANGEABLE
DIAL,CONTROL
LG-020
7690-01-158-3811INTERCHANGEABLE
MARKER,IDENTIFICATION
L20R
2805-01-278-4100INTERCHANGEABLE
CRANKSHAFT,ENGINE
L20
5996-01-626-3598INTERCHANGEABLE
AMPLIFIER,AUDIO FREQUENCY
L20

Frequently Asked Questions

What is NSN 4410-01-187-7138?

NSN 4410-01-187-7138 is a Heater,water,liquid Fuel, manufactured by Aldrico, Inc. Dba Aldrich Company, classified under FSC 4410 (No Item Name Available). Status: active.

What are the part numbers for NSN 4410-01-187-7138?

NSN 4410-01-187-7138 has 2 cross-referenced part numbers: L20W (Aldrico, Inc. Dba Aldrich Company), L-20 (Aldrico, Inc. Dba Aldrich Company).

What NSN replaces 4410-01-187-7138?

There are 10 known substitutes for 4410-01-187-7138: 6635-00-182-7534, 5330-00-285-8399, 5340-00-426-0568 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of L20W?

Key specifications for L20W: End Item Identification: ALDRICH HOT WATER BOILER-BURNER UNIT,SERIES L ASME; General Characteristics Item Description: OIL FIRED BOILER UNIT,STANDARD,NET RATING WATER BTU/HR 172; GROSS OUTPUT BTU/HR 198; FIRING RATE 2.0 GPH; 30 PSI WP,ROUND STEEL JACKET,45.875 IN.H,25.000 IN.DIA IN. 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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