PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A1-54Heater,thermal Release

Square D Co Columbia Mfg Plant · NSN 5999-01-037-0047 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-037-0047 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-037-0047. Primary manufacturer part number: A1-54.
Features
  • Heater,thermal Release — FSC 5999
  • 4 verified cross-references
  • Primary manufacturer: Square D Co Columbia Mfg Plant
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,thermal Release, cataloged under National Stock Number 5999-01-037-0047, 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 Square D Co Columbia Mfg Plant. This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameHeater,thermal Release
FSC / FSG5999 — No Item Name Available (FSG 59)
ManufacturersSquare D Co Columbia Mfg Plant (CAGE 51920); Square D Co Dallas Assembly Plant (CAGE 07442)
Technical Specifications
ParameterValue
NSN5999-01-037-0047
Primary Part NumberA1-54
Item NameHeater,thermal Release
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerSquare D Co Columbia Mfg Plant
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Weight0.0300 lbs
Cube0.0010 cu ft
Verified Substitutes 12
1095-00-019-1683A154 INTERCHANGEABLE
Panel,armament Selector
Lockheed Martin Corp
5950-00-118-8136278-2121-010 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
7320-00-126-3865 INTERCHANGEABLE
Arm,connecting
5120-00-156-9199613692 INTERCHANGEABLE
Contact Positioner,terminal Crim
Astro Tool Corp.
3455-00-194-052010160 INTERCHANGEABLE
Cutter,milling,plain
Niagara Cutter Inc
6685-00-245-4550A154 INTERCHANGEABLE
Indicator,humidity,plug
Aerodri Corp Keco Industries Inc Div
6810-00-264-9084 INTERCHANGEABLE
Hypophosphorous Acid
5961-00-452-0548 INTERCHANGEABLE
Semiconductor Device,diode
6150-00-909-0220711934 INTERCHANGEABLE
Lead,electrical
Belden Wire & Cable Company Llc Dba Belden Cdt Electronics Division
5340-01-016-7897A154 INTERCHANGEABLE
Plate,mending
General Devices Co Inc
Cross-Reference Index
Part NumberManufacturer
A1-54 Square D Co Columbia Mfg Plant (USA)
A1-54 Square D Co Dallas Assembly Plant (USA)
B31012-081 Square D Co Dallas Assembly Plant (USA)
B31012-081 Square D Co Columbia Mfg Plant (USA)
Related Parts
1095-00-019-1683INTERCHANGEABLE
PANEL,ARMAMENT SELECTOR
A154
5950-00-118-8136INTERCHANGEABLE
COIL,RADIO FREQUENCY
278-2121-010
7320-00-126-3865INTERCHANGEABLE
ARM,CONNECTING
5120-00-156-9199INTERCHANGEABLE
CONTACT POSITIONER,TERMINAL CRIM
613692
3455-00-194-0520INTERCHANGEABLE
CUTTER,MILLING,PLAIN
10160
6685-00-245-4550INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
A154
6810-00-264-9084INTERCHANGEABLE
HYPOPHOSPHOROUS ACID
5961-00-452-0548INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
6150-00-909-0220INTERCHANGEABLE
LEAD,ELECTRICAL
711934
5340-01-016-7897INTERCHANGEABLE
PLATE,MENDING
A154
6105-01-199-6321INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
A154
1005-01-315-8286INTERCHANGEABLE
PLATE,TRIGGER GUARD

Frequently Asked Questions

What is NSN 5999-01-037-0047?

NSN 5999-01-037-0047 is a Heater,thermal Release, manufactured by Square D Co Columbia Mfg Plant, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-037-0047?

NSN 5999-01-037-0047 has 4 cross-referenced part numbers: A1-54 (Square D Co Columbia Mfg Plant), A1-54 (Square D Co Dallas Assembly Plant), B31012-081 (Square D Co Dallas Assembly Plant), B31012-081 (Square D Co Columbia Mfg Plant).

What NSN replaces 5999-01-037-0047?

There are 12 known substitutes for 5999-01-037-0047: 1095-00-019-1683, 5950-00-118-8136, 7320-00-126-3865 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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