PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B22Heater,thermal Release

Ward Leonard Ct Llc · NSN 5999-00-444-6697 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-444-6697 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-444-6697. Primary manufacturer part number: B22.
Features
  • Heater,thermal Release — FSC 5999
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
  • Mounting Hole Diameter: 0.188 INCHES NOMINAL IN
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
  • Mounting Hole Diameter: 0.188 INCHES NOMINAL IN
  • 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 5999-00-444-6697, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-444-6697
Primary Part NumberB22
Item NameHeater,thermal Release
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerWard Leonard Ct Llc
StatusACTIVE
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Mounting Hole Diameter0.188 INCHES NOMINAL IN
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Mounting Hole Diameter0.188 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Verified Substitutes 12
5999-00-665-771115958-14ITEM16P1 SUCCESSOR
Heater,thermal Release
Ward Leonard Ct Llc
4820-00-274-7391590T-1.0 INTERCHANGEABLE
Valve,globe
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4730-00-289-5927 INTERCHANGEABLE
Clamp,hose
8455-00-387-0955 INTERCHANGEABLE
Sword Knot
6680-00-394-7335B22 INTERCHANGEABLE
Tip,convex
Schulze Mfg., Inc.
6740-00-436-4949 INTERCHANGEABLE
Printer,projection,photographic
5365-00-550-3078B2-2 INTERCHANGEABLE
Shim
Roller Bearing Co of America, Inc Div Pic Design
4820-00-595-1907TYPE 2/CLASS 150/SIZE 1-1/2 IN INTERCHANGEABLE
Valve,globe
Manufacturers Standardization Society of the Valve and Fittings Industry Inc
5120-00-726-37961556079 INTERCHANGEABLE
Wrench,ratchet
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5355-00-827-8682B-22 INTERCHANGEABLE
Knob
Reid Supply Company
Cross-Reference Index
Part NumberManufacturer
B22 PRIMARY Ward Leonard Ct Llc (USA)
Related Parts
5999-00-665-7711SUCCESSOR
HEATER,THERMAL RELEASE
15958-14ITEM16P1
4820-00-274-7391INTERCHANGEABLE
VALVE,GLOBE
590T-1.0
4730-00-289-5927INTERCHANGEABLE
CLAMP,HOSE
8455-00-387-0955INTERCHANGEABLE
SWORD KNOT
6680-00-394-7335INTERCHANGEABLE
TIP,CONVEX
B22
6740-00-436-4949INTERCHANGEABLE
PRINTER,PROJECTION,PHOTOGRAPHIC
5365-00-550-3078INTERCHANGEABLE
SHIM
B2-2
4820-00-595-1907INTERCHANGEABLE
VALVE,GLOBE
TYPE 2/CLASS 150/SIZE 1-1/2 IN
5120-00-726-3796INTERCHANGEABLE
WRENCH,RATCHET
1556079
5355-00-827-8682INTERCHANGEABLE
KNOB
B-22
4730-01-098-4494INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
1100
5330-01-165-1193INTERCHANGEABLE
SEAL,PLAIN
B-22

Frequently Asked Questions

What is NSN 5999-00-444-6697?

NSN 5999-00-444-6697 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 5999-00-444-6697?

NSN 5999-00-444-6697 has 1 cross-referenced part number: B22 (Ward Leonard Ct Llc).

What NSN replaces 5999-00-444-6697?

There are 12 known substitutes for 5999-00-444-6697: 5999-00-665-7711, 4820-00-274-7391, 4730-00-289-5927 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B22?

Key specifications for B22: Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Mounting Hole Diameter: 0.188 INCHES NOMINAL IN; Overall Height: 0.812 INCHES NOMINAL IN; Overall Length: 2.344 INCHES NOMINAL IN. 8 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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