PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

259869-1Heat Sink,electrical-Electronic

Varo Llc · NSN 5999-01-109-4987 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-109-4987 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-109-4987. Primary manufacturer part number: 259869-1.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • 4 verified cross-references
  • Primary manufacturer: Varo Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heat Sink,electrical-Electronic, cataloged under National Stock Number 5999-01-109-4987, 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 Varo Llc. This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-109-4987
Primary Part Number259869-1
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerVaro Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight0.0200 lbs
Cube0.0029 cu ft
Verified Substitutes 3
Heat Sink,electrical-Electronic
Heat Sink,electrical-Electronic
5999-01-326-8159205CB INTERCHANGEABLE
Heat Sink,electrical-Electronic
Goodrich Lighting Systems Inc
Cross-Reference Index
Part NumberManufacturer
259869-1 Raytheon Company Dba Raytheon (USA)
259869-1 PRIMARY Varo Llc (USA)
205CB Wakefield Corp the (USA)
259869-1 United Telecontrol Electronics Inc (USA)
Related Parts
5999-01-033-5474SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-475-4019SUCCESSOR
HEAT SINK,ELECTRICAL-ELECTRONIC
5999-01-326-8159INTERCHANGEABLE
HEAT SINK,ELECTRICAL-ELECTRONIC
205CB

Frequently Asked Questions

What is NSN 5999-01-109-4987?

NSN 5999-01-109-4987 is a Heat Sink,electrical-Electronic, manufactured by Varo Llc, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-109-4987?

NSN 5999-01-109-4987 has 4 cross-referenced part numbers: 259869-1 (Raytheon Company Dba Raytheon), 259869-1 (Varo Llc), 205CB (Wakefield Corp the), 259869-1 (United Telecontrol Electronics Inc).

What NSN replaces 5999-01-109-4987?

There are 3 known substitutes for 5999-01-109-4987: 5999-01-033-5474, 5999-01-475-4019, 5999-01-326-8159. Verify interchangeability with system specifications before substitution.

What are the specifications of 259869-1?

Key specifications for 259869-1: Special Features: CONSISTS OF A 10-PRONGED TUBE 0.180-0.200 IN. WIDE AND 0.680-0.760 IN. DIA. MADE FROM A SINGLE SHEET OF 0.010IN. THICK BERYLLIUM COPPER PER QQ-C-533,ALLOY 172,COND HT FINISHED WITH COPPER FLASH PER MIL-C-14550,CLASS 4 AND BLACK CHEMICAL FINISH PER MIL-F-495 TO A THICKNESS OF 0.005-0.015,DIAMETER OF APERATURE IS 0.240-0.265 IN; Special Features: CONSISTS OF A 10-PRONGED TUBE 0.180-0.200 IN. WIDE AND 0.680-0.760 IN. DIA. MADE FROM A SINGLE SHEET OF 0.010IN. THICK BERYLLIUM COPPER PER QQ-C-533,ALLOY 172,COND HT FINISHED WITH COPPER FLASH PER MIL-C-14550,CLASS 4 AND BLACK CHEMICAL FINISH PER MIL-F-495 TO A THICKNESS OF 0.005-0.015,DIAMETER OF APERATURE IS 0.240-0.265 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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