PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

300143-4Mounting Pad,electrical-Electron

Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion · NSN 5999-01-215-4070 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-215-4070 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-215-4070. Primary manufacturer part number: 300143-4.
Features
  • Mounting Pad,electrical-Electron — FSC 5999
  • Body Style: DISK
  • Mounting Slot Length: 0.089 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
  • Accommodated Device Mounting Hole Quantity: 1
  • Color: NATURAL
  • Overall Diameter: 0.350 INCHES NOMINAL IN
  • Material: PLASTIC POLYAMIDE NYLON
  • Material Document and Classification: MIL-M-20693A,COMPOSITION A,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE A
Applications
  • Applications requiring Plastic Polyamide Nylon construction
General Description

The Mounting Pad,electrical-Electron, cataloged under National Stock Number 5999-01-215-4070, 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 Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 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
NSN5999-01-215-4070
Primary Part Number300143-4
Item NameMounting Pad,electrical-Electron
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerLockheed Martin Sippican, Inc. Div Lockheed Martin Marion
StatusACTIVE
Body StyleDISK
Mounting Slot Length0.089 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Accommodated Device Mounting Hole Quantity1
ColorNATURAL
Overall Diameter0.350 INCHES NOMINAL IN
MaterialPLASTIC POLYAMIDE NYLON
Material Document and ClassificationMIL-M-20693A,COMPOSITION A,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE A
Mounting Facility Type and Quantity4 SLOT SINGLE MOUNTING FACILITY
Accommodated Device Mounting Hole Pattern StyleFOUR HOLE - 0.200 INCH IN
Body StyleDISK
Mounting Slot Length0.089 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Accommodated Device Mounting Hole Quantity1
ColorNATURAL
Overall Diameter0.350 INCHES NOMINAL IN
MaterialPLASTIC POLYAMIDE NYLON
Material Document and ClassificationMIL-M-20693A,COMPOSITION A,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE A
Mounting Facility Type and Quantity4 SLOT SINGLE MOUNTING FACILITY
Accommodated Device Mounting Hole Pattern StyleFOUR HOLE - 0.200 INCH IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Weight0.0100 lbs
Cube0.0082 cu ft
Verified Substitutes 5
5940-00-725-7258505-120 INTERCHANGEABLE
Terminal,lug
Zierick Mfg Corp
5961-00-883-6389 INTERCHANGEABLE
Transistor
4920-01-247-3645 INTERCHANGEABLE
Adapter,test
6130-01-487-6358 INTERCHANGEABLE
Power Supply
4220-01-701-9285505-120 INTERCHANGEABLE
Breech Ring,diver's Helmet
Kirby Morgan Dive Systems Inc
Cross-Reference Index
Part NumberManufacturer
410143-3 Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion (USA)
300143-4 PRIMARY Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion (USA)
505-120 Bivar Inc (USA)
S235A202-10 PRIMARY Telephonics Corp (USA)
Related Parts
5940-00-725-7258INTERCHANGEABLE
TERMINAL,LUG
505-120
5961-00-883-6389INTERCHANGEABLE
TRANSISTOR
4920-01-247-3645INTERCHANGEABLE
ADAPTER,TEST
6130-01-487-6358INTERCHANGEABLE
POWER SUPPLY
4220-01-701-9285INTERCHANGEABLE
BREECH RING,DIVER'S HELMET
505-120

Frequently Asked Questions

What is NSN 5999-01-215-4070?

NSN 5999-01-215-4070 is a Mounting Pad,electrical-Electron, manufactured by Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-215-4070?

NSN 5999-01-215-4070 has 4 cross-referenced part numbers: 410143-3 (Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion), 300143-4 (Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion), 505-120 (Bivar Inc), S235A202-10 (Telephonics Corp).

What NSN replaces 5999-01-215-4070?

There are 5 known substitutes for 5999-01-215-4070: 5940-00-725-7258, 5961-00-883-6389, 4920-01-247-3645 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 300143-4?

Key specifications for 300143-4: Body Style: DISK; Mounting Slot Length: 0.089 INCHES NOMINAL SINGLE MOUNTING FACILITY IN; Accommodated Device Mounting Hole Quantity: 1; Color: NATURAL. 20 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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