PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2185778-1Delay Line

L3 Technologies, Inc. Div Communication Systems-East · NSN 5999-00-162-1889 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-162-1889 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-162-1889. Primary manufacturer part number: 2185778-1.
Features
  • Delay Line — FSC 5999
  • Shaft Length: 0.490 INCHES NOMINAL IN
  • Shaft Style: ROUND, SLOTTED
  • Adjustment Device Drive Type: SHAFT
  • Body Width: 1.250 INCHES MAXIMUM IN
  • Stud Length: 0.470 INCHES NOMINAL IN
  • Body Length: 6.530 INCHES NOMINAL IN
  • Individual Section Quantity: 1
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Delay Line, cataloged under National Stock Number 5999-00-162-1889, 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 L3 Technologies, Inc. Div Communication Systems-East. Government technical data includes 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-162-1889
Primary Part Number2185778-1
Item NameDelay Line
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerL3 Technologies, Inc. Div Communication Systems-East
StatusACTIVE
Shaft Length0.490 INCHES NOMINAL IN
Shaft StyleROUND, SLOTTED
Adjustment Device Drive TypeSHAFT
Body Width1.250 INCHES MAXIMUM IN
Stud Length0.470 INCHES NOMINAL IN
Body Length6.530 INCHES NOMINAL IN
Individual Section Quantity1
Adjustment Device Quantity1
Longest Horizontal Distance Between Mounting Centers5.000 INCHES NOMINAL IN
Mounting Facility Quantity2
Mounting Provision Arrangement Style2 POSITION IN-LINE
Delay Time Variation MethodVARIABLE
Section Delay Time300.000 NANOSECONDS NOMINAL SINGLE SECTION NS
Thread Size and Series/type Designator0.164-32 UNIFIED NATIONAL COARSE (UNC)
Signal Delay MethodINDUCTANCE
Terminal Type and Quantity4 WIRE LOOP
Body Depth0.660 INCHES MAXIMUM IN
Attenuation in Decibels1.000
Mounting FacilityTHREADED STUD(S)
Thread Class2A A
Slot Depth0.130 INCHES NOMINAL IN
Thread Pitch Diameters+0.1257 TO 0.1437 INCHES IN
Body StyleRECTANGULAR
Slot Width0.050 INCHES NOMINAL IN
Shaft Length0.490 INCHES NOMINAL IN
Shaft StyleROUND, SLOTTED
Adjustment Device Drive TypeSHAFT
Body Width1.250 INCHES MAXIMUM IN
Stud Length0.470 INCHES NOMINAL IN
Body Length6.530 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5999-00-171-3246 (7402)
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 4
5999-00-171-32467402 SUCCESSOR
Contact,electrical
Telemechanics Inc
5998-00-456-49047402 SUCCESSOR
Circuit Card Assembly
Drs Signal Solutions, Inc.
6625-01-320-75297402 SUCCESSOR
Generator,signal
Prema Precision Electronics Inc
7045-01-579-14357402 SUCCESSOR
Ultra Comm
Sealevel Systems Inc
Cross-Reference Index
Part NumberManufacturer
74-02 Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil (USA)
2185778-1 PRIMARY L3 Technologies, Inc. Div Communication Systems-East (USA)
2185778-1 Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin (USA)
Related Parts
SUCCESSOR 5999-00-171-3246 Contact,electrical · 7402
5998-00-456-4904SUCCESSOR
CIRCUIT CARD ASSEMBLY
7402
6625-01-320-7529SUCCESSOR
GENERATOR,SIGNAL
7402
7045-01-579-1435SUCCESSOR
ULTRA COMM
7402

Frequently Asked Questions

What is NSN 5999-00-162-1889?

NSN 5999-00-162-1889 is a Delay Line, manufactured by L3 Technologies, Inc. Div Communication Systems-East, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-162-1889?

NSN 5999-00-162-1889 has 3 cross-referenced part numbers: 74-02 (Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil), 2185778-1 (L3 Technologies, Inc. Div Communication Systems-East), 2185778-1 (Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin).

What NSN replaces 5999-00-162-1889?

There are 4 known substitutes for 5999-00-162-1889: 5999-00-171-3246, 5998-00-456-4904, 6625-01-320-7529 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2185778-1?

Key specifications for 2185778-1: Shaft Length: 0.490 INCHES NOMINAL IN; Shaft Style: ROUND, SLOTTED; Adjustment Device Drive Type: SHAFT; Body Width: 1.250 INCHES MAXIMUM IN. 30 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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