PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12A43Delay Line

Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil · NSN 5999-00-078-9347 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-078-9347 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-078-9347. Primary manufacturer part number: 12A43.
Features
  • Delay Line — FSC 5999
  • Delay Time Variation Method: TAPPED
  • Signal Delay Method: INDUCTANCE
  • Specification/standard Data: 97942-580R021 MANUFACTURERS SPECIFICATION CONTROL
  • Step Quantity: 4
  • Delay Time Variation Method: TAPPED
  • Signal Delay Method: INDUCTANCE
  • Specification/standard Data: 97942-580R021 MANUFACTURERS SPECIFICATION CONTROL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Delay Line, cataloged under National Stock Number 5999-00-078-9347, 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 Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-078-9347
Primary Part Number12A43
Item NameDelay Line
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerEsc Control Electronics Llc Dba Control Electronics Division of Fil-Coil
StatusACTIVE
Delay Time Variation MethodTAPPED
Signal Delay MethodINDUCTANCE
Specification/standard Data97942-580R021 MANUFACTURERS SPECIFICATION CONTROL
Step Quantity4
Delay Time Variation MethodTAPPED
Signal Delay MethodINDUCTANCE
Specification/standard Data97942-580R021 MANUFACTURERS SPECIFICATION CONTROL
Step Quantity4
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Verified Substitutes 12
Contact,electrical
5120-00-032-9452 INTERCHANGEABLE
Expander
4920-00-067-81642948 INTERCHANGEABLE
Bar,pair,blade Posi
Marvel Manufacturing Co Div the Marvel Manufacturing Company
5331-00-069-5189B58108 INTERCHANGEABLE
O-Ring
Parco, Llc
5360-00-526-98732948 INTERCHANGEABLE
Spring,helical,compression
Eaton Aerospace, Llc Dba Jackson South
5120-00-585-07382948 INTERCHANGEABLE
Alignment Tool,electronic Equipm
Wta Tool Llc
5220-00-630-6262 INTERCHANGEABLE
Gage,profile
2530-00-860-98375465469 INTERCHANGEABLE
Parts Kit,hydraulic Brake Master
General Motors Llc Dba General Motors Llc
3040-00-938-42212948 INTERCHANGEABLE
Shaft,straight
Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.
5930-01-146-0395L507001891 INTERCHANGEABLE
Switch,code Indicating Wheel
Lockheed Martin Librascope Corporation
Cross-Reference Index
Part NumberManufacturer
12A43 PRIMARY Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil (USA)
580R021H02 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
2948 PRIMARY M.e. Systems of Texas,inc. (USA)
F1090 PRIMARY Neurotech Corp Control Electronics Div (USA)
Related Parts
5999-00-035-9006SUCCESSOR
CONTACT,ELECTRICAL
5120-00-032-9452INTERCHANGEABLE
EXPANDER
4920-00-067-8164INTERCHANGEABLE
BAR,PAIR,BLADE POSI
2948
5331-00-069-5189INTERCHANGEABLE
O-RING
B58108
5360-00-526-9873INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
2948
5120-00-585-0738INTERCHANGEABLE
ALIGNMENT TOOL,ELECTRONIC EQUIPM
2948
5220-00-630-6262INTERCHANGEABLE
GAGE,PROFILE
2530-00-860-9837INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE MASTER
5465469
3040-00-938-4221INTERCHANGEABLE
SHAFT,STRAIGHT
2948
5930-01-146-0395INTERCHANGEABLE
SWITCH,CODE INDICATING WHEEL
L507001891
5935-01-162-0506INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
4820-01-272-8787INTERCHANGEABLE
PARTS KIT,PRESSURE REGULATING VA

Frequently Asked Questions

What is NSN 5999-00-078-9347?

NSN 5999-00-078-9347 is a Delay Line, manufactured by Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-078-9347?

NSN 5999-00-078-9347 has 4 cross-referenced part numbers: 12A43 (Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil), 580R021H02 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 2948 (M.e. Systems of Texas,inc.), F1090 (Neurotech Corp Control Electronics Div).

What NSN replaces 5999-00-078-9347?

There are 12 known substitutes for 5999-00-078-9347: 5999-00-035-9006, 5120-00-032-9452, 4920-00-067-8164 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12A43?

Key specifications for 12A43: Delay Time Variation Method: TAPPED; Signal Delay Method: INDUCTANCE; Specification/standard Data: 97942-580R021 MANUFACTURERS SPECIFICATION CONTROL; Step Quantity: 4. 8 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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