PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

128521-1Extender,service,assembly

Continental Electronics Corp · NSN 5999-01-057-1598 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-057-1598 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-057-1598. Primary manufacturer part number: 128521-1.
Features
  • Extender,service,assembly — FSC 5999
  • General Characteristics Item Description: COMPONENT QTY 13; 1 EA P/N 1285221 CARD EXTENDER SERVICE; 2 EA P/N 128525-1 BRACKET; 2 EA P/N E-409-013904 SCREW; 2 EA P/N E-409-013938,2 EA SCREW; 2 EA SCREW; 2 EA WASHER FLAT
  • General Characteristics Item Description: COMPONENT QTY 13; 1 EA P/N 1285221 CARD EXTENDER SERVICE; 2 EA P/N 128525-1 BRACKET; 2 EA P/N E-409-013904 SCREW; 2 EA P/N E-409-013938,2 EA SCREW; 2 EA SCREW; 2 EA WASHER FLAT
  • 2 verified cross-references
  • Primary manufacturer: Continental Electronics Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Extender,service,assembly, cataloged under National Stock Number 5999-01-057-1598, 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 Continental Electronics Corp. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5999-01-057-1598
Primary Part Number128521-1
Item NameExtender,service,assembly
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerContinental Electronics Corp
StatusACTIVE
General Characteristics Item DescriptionCOMPONENT QTY 13; 1 EA P/N 1285221 CARD EXTENDER SERVICE; 2 EA P/N 128525-1 BRACKET; 2 EA P/N E-409-013904 SCREW; 2 EA P/N E-409-013938,2 EA SCREW; 2 EA SCREW; 2 EA WASHER FLAT
General Characteristics Item DescriptionCOMPONENT QTY 13; 1 EA P/N 1285221 CARD EXTENDER SERVICE; 2 EA P/N 128525-1 BRACKET; 2 EA P/N E-409-013904 SCREW; 2 EA P/N E-409-013938,2 EA SCREW; 2 EA SCREW; 2 EA WASHER FLAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5910-00-952-8922 INTERCHANGEABLE
Capacitor,variable,mica Dielectr
5120-01-256-2552128521 INTERCHANGEABLE
Jack,leveling-Support
Scientific Atlanta Inc
2520-01-392-0411128521 INTERCHANGEABLE
Disk,clutch,vehicular
Eaton Corp Clutch Div
5985-01-591-3422133275-1 INTERCHANGEABLE
Coupler,rotary,radio Frequency
Sea Tel, Inc. Dba Cobham Satcom Div Cobham Satcom
Cross-Reference Index
Part NumberManufacturer
128521-1 PRIMARY Continental Electronics Corp (USA)
128521 Continental Electronics Corp (USA)
Related Parts
5910-00-952-8922INTERCHANGEABLE
CAPACITOR,VARIABLE,MICA DIELECTR
5120-01-256-2552INTERCHANGEABLE
JACK,LEVELING-SUPPORT
128521
2520-01-392-0411INTERCHANGEABLE
DISK,CLUTCH,VEHICULAR
128521
5985-01-591-3422INTERCHANGEABLE
COUPLER,ROTARY,RADIO FREQUENCY
133275-1

Frequently Asked Questions

What is NSN 5999-01-057-1598?

NSN 5999-01-057-1598 is a Extender,service,assembly, manufactured by Continental Electronics Corp, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-057-1598?

NSN 5999-01-057-1598 has 2 cross-referenced part numbers: 128521-1 (Continental Electronics Corp), 128521 (Continental Electronics Corp).

What NSN replaces 5999-01-057-1598?

There are 4 known substitutes for 5999-01-057-1598: 5910-00-952-8922, 5120-01-256-2552, 2520-01-392-0411 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 128521-1?

Key specifications for 128521-1: End Item Identification: ANTENNA SYSTEM MODEL 2613; General Characteristics Item Description: COMPONENT QTY 13; 1 EA P/N 1285221 CARD EXTENDER SERVICE; 2 EA P/N 128525-1 BRACKET; 2 EA P/N E-409-013904 SCREW; 2 EA P/N E-409-013938,2 EA SCREW; 2 EA SCREW; 2 EA WASHER FLAT; End Item Identification: ANTENNA SYSTEM MODEL 2613; General Characteristics Item Description: COMPONENT QTY 13; 1 EA P/N 1285221 CARD EXTENDER SERVICE; 2 EA P/N 128525-1 BRACKET; 2 EA P/N E-409-013904 SCREW; 2 EA P/N E-409-013938,2 EA SCREW; 2 EA SCREW; 2 EA WASHER FLAT. 4 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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