PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

W154Heater,thermal Release

Ward Leonard Ct Llc · NSN 5999-00-020-8229 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-020-8229 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-020-8229. Primary manufacturer part number: W154.
Features
  • Heater,thermal Release — FSC 5999
  • Mounting Hole Diameter: 0.125 INCHES NOMINAL IN
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
  • Mounting Hole Diameter: 0.125 INCHES NOMINAL IN
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
  • 1 verified cross-reference
  • Primary manufacturer: Ward Leonard Ct Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,thermal Release, cataloged under National Stock Number 5999-00-020-8229, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Ward Leonard Ct Llc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-020-8229
Primary Part NumberW154
Item NameHeater,thermal Release
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerWard Leonard Ct Llc
StatusACTIVE
Mounting Hole Diameter0.125 INCHES NOMINAL IN
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Mounting Hole Diameter0.125 INCHES NOMINAL IN
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 2
5120-00-278-0341W-154 INTERCHANGEABLE
Wrench,adjustable
Ngk Metals Corporation Dba N G K Berylco
2910-00-361-5410X-260 INTERCHANGEABLE
Nozzle,fuel Injection
Cooper Machinery Services Llc
Cross-Reference Index
Part NumberManufacturer
W154 PRIMARY Ward Leonard Ct Llc (USA)
Related Parts
5120-00-278-0341INTERCHANGEABLE
WRENCH,ADJUSTABLE
W-154
2910-00-361-5410INTERCHANGEABLE
NOZZLE,FUEL INJECTION
X-260

Frequently Asked Questions

What is NSN 5999-00-020-8229?

NSN 5999-00-020-8229 is a Heater,thermal Release, manufactured by Ward Leonard Ct Llc, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-020-8229?

NSN 5999-00-020-8229 has 1 cross-referenced part number: W154 (Ward Leonard Ct Llc).

What NSN replaces 5999-00-020-8229?

There are 2 known substitutes for 5999-00-020-8229: 5120-00-278-0341, 2910-00-361-5410. Verify interchangeability with system specifications before substitution.

What are the specifications of W154?

Key specifications for W154: Overall Width: 0.125 INCHES NOMINAL IN; Mounting Hole Diameter: 0.125 INCHES NOMINAL IN; Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Overall Height: 0.562 INCHES NOMINAL IN. 10 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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