PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SL8Heat Sink,electrical-Electronic

Reliance Mica Company, Inc. · NSN 5999-00-851-0138 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-851-0138 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-851-0138. Primary manufacturer part number: SL8.
Features
  • Heat Sink,electrical-Electronic — FSC 5999
  • Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Unthreaded Mounting Hole Diameter: 0.166 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
  • Unthreaded Mounting Hole Diameter: 0.166 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • 2 verified cross-references
  • Primary manufacturer: Reliance Mica Company, Inc.
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 5999-00-851-0138, 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 Reliance Mica Company, Inc.. Government technical data includes 4 verified specifications, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-851-0138
Primary Part NumberSL8
Item NameHeat Sink,electrical-Electronic
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerReliance Mica Company, Inc.
StatusACTIVE
Mounting Facility Type and Quantity4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Unthreaded Mounting Hole Diameter0.166 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Mounting Facility Type and Quantity4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Unthreaded Mounting Hole Diameter0.166 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Weight0.0200 lbs
Cube0.0010 cu ft
Verified Substitutes 5
5965-00-163-5113 INTERCHANGEABLE
Loudspeaker,permanent Magnet
5965-00-175-5634WB8 INTERCHANGEABLE
Case,loudspeaker
Bogen Communications Inc
7690-01-241-2208HMSL80 INTERCHANGEABLE
Marker,identification
American Labelmark Company Div Labelmaster
7690-01-420-8391SL-8 INTERCHANGEABLE
Label
Brady United States
6625-01-662-6924SL-8 INTERCHANGEABLE
Simulator,multi Parameter
Pronk Technologies Inc.
Cross-Reference Index
Part NumberManufacturer
128-006-0006 Northrop Grumman Systems Corporation (USA)
SL8 PRIMARY Reliance Mica Company, Inc. (USA)
Related Parts
5965-00-163-5113INTERCHANGEABLE
LOUDSPEAKER,PERMANENT MAGNET
5965-00-175-5634INTERCHANGEABLE
CASE,LOUDSPEAKER
WB8
7690-01-241-2208INTERCHANGEABLE
MARKER,IDENTIFICATION
HMSL80
7690-01-420-8391INTERCHANGEABLE
LABEL
SL-8
6625-01-662-6924INTERCHANGEABLE
SIMULATOR,MULTI PARAMETER
SL-8

Frequently Asked Questions

What is NSN 5999-00-851-0138?

NSN 5999-00-851-0138 is a Heat Sink,electrical-Electronic, manufactured by Reliance Mica Company, Inc., classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-851-0138?

NSN 5999-00-851-0138 has 2 cross-referenced part numbers: 128-006-0006 (Northrop Grumman Systems Corporation), SL8 (Reliance Mica Company, Inc.).

What NSN replaces 5999-00-851-0138?

There are 5 known substitutes for 5999-00-851-0138: 5965-00-163-5113, 5965-00-175-5634, 7690-01-241-2208 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SL8?

Key specifications for SL8: Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Width: 1.060 INCHES NOMINAL IN; Overall Length: 1.650 INCHES NOMINAL IN; Unthreaded Mounting Hole Diameter: 0.166 INCHES NOMINAL SINGLE MOUNTING FACILITY IN. 10 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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