PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B21Heater,thermal Release

Ward Leonard Ct Llc · NSN 5999-00-419-0228 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-419-0228 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-419-0228. Primary manufacturer part number: B21.
Features
  • Heater,thermal Release — FSC 5999
  • 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 5999-00-419-0228, 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. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Catalog Facts
Item NameHeater,thermal Release
FSC / FSG5999 — No Item Name Available (FSG 59)
ManufacturersWard Leonard Ct Llc (CAGE 63743)
Technical Specifications
ParameterValue
NSN5999-00-419-0228
Primary Part NumberB21
Item NameHeater,thermal Release
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerWard Leonard Ct Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeX
Weight0.0100 lbs
Cube0.0010 cu ft
Verified Substitutes 12
4730-00-014-2434SAE J512 7 040110B INTERCHANGEABLE
Inverted Nut,tube Coupling
Sae International Dba Sae International
5999-00-045-6309B2-1 INTERCHANGEABLE
Heater,thermal Release
Schneider Electric Usa, Inc.
5910-00-196-0084 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
7320-00-336-5641B21 INTERCHANGEABLE
Shaft Assy
Insinger Machine Co
6680-00-394-7334B21 INTERCHANGEABLE
Tip,triangular
Schulze Mfg., Inc.
5365-00-685-7023402265-2 INTERCHANGEABLE
Shim
Raytheon Company Dba Raytheon
4310-00-829-5001B21 INTERCHANGEABLE
Pin,piston
Gardner Denver Inc.
3110-01-070-7981 INTERCHANGEABLE
Bearing,ball,annular
3110-01-164-1107B-21 INTERCHANGEABLE
Collar,bearing
United States Monorail Corp Stanspec Div
5120-01-278-4820B-21 INTERCHANGEABLE
Screwdriver,flat Tip
Ngk Metals Corporation Dba N G K Berylco
Cross-Reference Index
Part NumberManufacturer
B21 PRIMARY Ward Leonard Ct Llc (USA)
Related Parts
4730-00-014-2434INTERCHANGEABLE
INVERTED NUT,TUBE COUPLING
SAE J512 7 040110B
5999-00-045-6309INTERCHANGEABLE
HEATER,THERMAL RELEASE
B2-1
5910-00-196-0084INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
7320-00-336-5641INTERCHANGEABLE
SHAFT ASSY
B21
6680-00-394-7334INTERCHANGEABLE
TIP,TRIANGULAR
B21
5365-00-685-7023INTERCHANGEABLE
SHIM
402265-2
4310-00-829-5001INTERCHANGEABLE
PIN,PISTON
B21
3110-01-070-7981INTERCHANGEABLE
BEARING,BALL,ANNULAR
3110-01-164-1107INTERCHANGEABLE
COLLAR,BEARING
B-21
5120-01-278-4820INTERCHANGEABLE
SCREWDRIVER,FLAT TIP
B-21
3010-01-284-5849INTERCHANGEABLE
DISC
B 21
5355-01-379-7666INTERCHANGEABLE
KNOB

Frequently Asked Questions

What is NSN 5999-00-419-0228?

NSN 5999-00-419-0228 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 5999-00-419-0228?

NSN 5999-00-419-0228 has 1 cross-referenced part number: B21 (Ward Leonard Ct Llc).

What NSN replaces 5999-00-419-0228?

There are 12 known substitutes for 5999-00-419-0228: 4730-00-014-2434, 5999-00-045-6309, 5910-00-196-0084 and 9 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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