PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S966496Heater,thermal Release

Westinghouse Electric Corp · NSN 5999-00-735-9865 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-735-9865 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-735-9865. Primary manufacturer part number: S966496.
Features
  • Heater,thermal Release — FSC 5999
  • 5 verified cross-references
  • Primary manufacturer: Westinghouse Electric Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,thermal Release, cataloged under National Stock Number 5999-00-735-9865, 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 Westinghouse Electric Corp. This item has 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Catalog Facts
Item NameHeater,thermal Release
FSC / FSG5999 — No Item Name Available (FSG 59)
ManufacturersWestinghouse Electric Corp (CAGE 79500); Westinghouse Electric Corp Control Business Unit (CAGE 11660)
Technical Specifications
ParameterValue
NSN5999-00-735-9865
Primary Part NumberS966496
Item NameHeater,thermal Release
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerWestinghouse Electric Corp
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeLN
Verified Substitutes 6
6135-00-112-8634 INTERCHANGEABLE
Battery,nonrechargeable
9905-00-318-01878378551 INTERCHANGEABLE
Plate,identification
U S Army Tank Automotive Command Amsta-Im-Mm
6750-00-522-2706 INTERCHANGEABLE
Plasticizer,photographic
5365-01-081-1010SM-C-772659-4 INTERCHANGEABLE
Shim
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4820-01-252-4457B121 INTERCHANGEABLE
Valve,gate
Stockham Valves and Fittings Inc
5930-01-680-4180B121 INTERCHANGEABLE
Switch,thermostatic
Chromalox Inc
Cross-Reference Index
Part NumberManufacturer
S966496 PRIMARY Westinghouse Electric Corp (USA)
966496 PRIMARY Westinghouse Electric Corp (USA)
B121 Westinghouse Electric Corp Control Business Unit
B121 Westinghouse Electric Corp (USA)
1A4437G32 PRIMARY Westinghouse Electric Corp (USA)
Related Parts
6135-00-112-8634INTERCHANGEABLE
BATTERY,NONRECHARGEABLE
9905-00-318-0187INTERCHANGEABLE
PLATE,IDENTIFICATION
8378551
6750-00-522-2706INTERCHANGEABLE
PLASTICIZER,PHOTOGRAPHIC
5365-01-081-1010INTERCHANGEABLE
SHIM
SM-C-772659-4
4820-01-252-4457INTERCHANGEABLE
VALVE,GATE
B121
5930-01-680-4180INTERCHANGEABLE
SWITCH,THERMOSTATIC
B121

Frequently Asked Questions

What is NSN 5999-00-735-9865?

NSN 5999-00-735-9865 is a Heater,thermal Release, manufactured by Westinghouse Electric Corp, classified under FSC 5999 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5999-00-735-9865?

NSN 5999-00-735-9865 has 5 cross-referenced part numbers: S966496 (Westinghouse Electric Corp), 966496 (Westinghouse Electric Corp), B121 (Westinghouse Electric Corp Control Business Unit), B121 (Westinghouse Electric Corp), 1A4437G32 (Westinghouse Electric Corp).

What NSN replaces 5999-00-735-9865?

There are 6 known substitutes for 5999-00-735-9865: 6135-00-112-8634, 9905-00-318-0187, 6750-00-522-2706 and 3 more. Verify interchangeability with system specifications before substitution.

Is NSN 5999-00-735-9865 still in active supply?

NSN 5999-00-735-9865 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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