PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B8.20Heater,thermal Release

Schneider Electric Usa, Inc. · NSN 5999-00-986-4243 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-986-4243 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-986-4243. Primary manufacturer part number: B8.20.
Features
  • Heater,thermal Release — FSC 5999
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
  • 5 verified cross-references
  • Primary manufacturer: Schneider Electric Usa, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,thermal Release, cataloged under National Stock Number 5999-00-986-4243, 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 Schneider Electric Usa, Inc.. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, 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
NSN5999-00-986-4243
Primary Part NumberB8.20
Item NameHeater,thermal Release
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerSchneider Electric Usa, Inc.
StatusACTIVE
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor7025-01-505-3747 (B820)
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeZZ
Weight0.0600 lbs
Cube0.0105 cu ft
Verified Substitutes 2
7025-01-505-3747B820 SUCCESSOR
Data Display Group
Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
5925-00-500-9364B8-2 INTERCHANGEABLE
Thermal Release,circuit Breaker
Schneider Electric Usa, Inc. Dba Schneider Electric
Cross-Reference Index
Part NumberManufacturer
F284-1262-1 Mission Systems Orchard Park Inc (USA)
B8-20 Schneider Electric Usa, Inc. (USA)
1034-D700-77 Cepeda Associates, Inc. Dba Cepeda Associates Inc (USA)
B8-20 Schneider Electric Usa, Inc. (USA)
B8.20 PRIMARY Schneider Electric Usa, Inc. (USA)
Related Parts
SUCCESSOR 7025-01-505-3747 Data Display Group · B820
5925-00-500-9364INTERCHANGEABLE
THERMAL RELEASE,CIRCUIT BREAKER
B8-2

Frequently Asked Questions

What is NSN 5999-00-986-4243?

NSN 5999-00-986-4243 is a Heater,thermal Release, manufactured by Schneider Electric Usa, Inc., classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-986-4243?

NSN 5999-00-986-4243 has 5 cross-referenced part numbers: F284-1262-1 (Mission Systems Orchard Park Inc), B8-20 (Schneider Electric Usa, Inc.), 1034-D700-77 (Cepeda Associates, Inc. Dba Cepeda Associates Inc), B8-20 (Schneider Electric Usa, Inc.), B8.20 (Schneider Electric Usa, Inc.).

What NSN replaces 5999-00-986-4243?

There are 2 known substitutes for 5999-00-986-4243: 7025-01-505-3747, 5925-00-500-9364. Verify interchangeability with system specifications before substitution.

What are the specifications of B8.20?

Key specifications for B8.20: Overall Height: 0.969 INCHES NOMINAL IN; Overall Length: 1.906 INCHES NOMINAL IN; Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Overall Height: 0.969 INCHES NOMINAL IN. 6 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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