PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

TSSM-18Heater,searchlight

Chromalox Inc Dba Chromalox Precision Heat and Control, Inc · NSN 4540-01-188-4549 · FSC 4540 · No Item Name Available
Verified by PartsTable
NSN 4540-01-188-4549 — this item is cataloged by the U.S. Government under National Stock Number 4540-01-188-4549. Primary manufacturer part number: TSSM-18.
Features
  • Heater,searchlight — FSC 4540
  • General Characteristics Item Description: 18.000 IN. LG; W/WIRE LEADS; JOINTS SEALED BETWEEN SLEEVING AND METAL SHEATH AND SLEEVING AND WIRE LEADS IN
  • 2 verified cross-references
  • Primary manufacturer: Chromalox Inc Dba Chromalox Precision Heat and Control, Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,searchlight, cataloged under National Stock Number 4540-01-188-4549, is classified within Federal Supply Class 4540 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Chromalox Inc Dba Chromalox Precision Heat and Control, Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 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.

Technical Specifications
ParameterValue
NSN4540-01-188-4549
Primary Part NumberTSSM-18
Item NameHeater,searchlight
FSC / FSG4540 / 45 — No Item Name Available
ManufacturerChromalox Inc Dba Chromalox Precision Heat and Control, Inc
StatusACTIVE
General Characteristics Item Description18.000 IN. LG; W/WIRE LEADS; JOINTS SEALED BETWEEN SLEEVING AND METAL SHEATH AND SLEEVING AND WIRE LEADS IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5905-00-058-1765 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
5985-00-239-72752135487G1 INTERCHANGEABLE
Attenuator,fixed
L3harris Technologies, Inc.
5935-00-341-0063 INTERCHANGEABLE
Connector,plug,electrical
2805-00-375-00082C7743 INTERCHANGEABLE
Ring Set
Hastings Manufacturing Co Div Hastings Manufacturing Company
5305-00-383-9275 INTERCHANGEABLE
Screw
4720-00-393-39074333 INTERCHANGEABLE
Hose Assembly,nonmetallic
Thomas C. Wilson, Llc Dba Thomas C Wilson Inc
5895-00-494-66414333 INTERCHANGEABLE
Installation Kit,electronic Equi
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5330-00-501-9477Q4333-366Y INTERCHANGEABLE
Packing,preformed
Minnesota Rubber Co
6680-00-852-02634333 INTERCHANGEABLE
Detector,low Oil Le
Invensys Systems, Inc. Dba Schneider Electric
5305-00-993-43134333U INTERCHANGEABLE
Screw,shoulder
Roller Bearing Co of America, Inc Div Pic Design
Cross-Reference Index
Part NumberManufacturer
TSSM-18 PRIMARY Chromalox Inc Dba Chromalox Precision Heat and Control, Inc (USA)
4333 PRIMARY Carlisle & Finch Co (USA)
Related Parts
5905-00-058-1765INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
5985-00-239-7275INTERCHANGEABLE
ATTENUATOR,FIXED
2135487G1
5935-00-341-0063INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
2805-00-375-0008INTERCHANGEABLE
RING SET
2C7743
5305-00-383-9275INTERCHANGEABLE
SCREW
4720-00-393-3907INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
4333
5895-00-494-6641INTERCHANGEABLE
INSTALLATION KIT,ELECTRONIC EQUI
4333
5330-00-501-9477INTERCHANGEABLE
PACKING,PREFORMED
Q4333-366Y
6680-00-852-0263INTERCHANGEABLE
DETECTOR,LOW OIL LE
4333
5305-00-993-4313INTERCHANGEABLE
SCREW,SHOULDER
4333U
5820-01-011-0305INTERCHANGEABLE
CARRING CASE,RADIO
5985-01-309-9751INTERCHANGEABLE
ATTENUATOR,VARIABLE
DE-A-2939

Frequently Asked Questions

What is NSN 4540-01-188-4549?

NSN 4540-01-188-4549 is a Heater,searchlight, manufactured by Chromalox Inc Dba Chromalox Precision Heat and Control, Inc, classified under FSC 4540 (No Item Name Available). Status: active.

What are the part numbers for NSN 4540-01-188-4549?

NSN 4540-01-188-4549 has 2 cross-referenced part numbers: TSSM-18 (Chromalox Inc Dba Chromalox Precision Heat and Control, Inc), 4333 (Carlisle & Finch Co).

What NSN replaces 4540-01-188-4549?

There are 12 known substitutes for 4540-01-188-4549: 5905-00-058-1765, 5985-00-239-7275, 5935-00-341-0063 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of TSSM-18?

Key specifications for TSSM-18: Special Features: SOURCE OF SUPPLY PER 339 CASE DSCP-FC-19-24642; General Characteristics Item Description: 18.000 IN. LG; W/WIRE LEADS; JOINTS SEALED BETWEEN SLEEVING AND METAL SHEATH AND SLEEVING AND WIRE LEADS IN. 2 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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