PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

575R991H02Delay Line

Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp · NSN 5999-00-958-7769 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-958-7769 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-958-7769. Primary manufacturer part number: 575R991H02.
Features
  • Delay Line — FSC 5999
  • Thread Size and Series/type Designator: 0.112-40 UNIFIED NATIONAL COARSE (UNC)
  • Body Depth: 0.575 INCHES NOMINAL IN
  • Unable to Decode: UNABLE TO DECODE
  • Mounting Facility: THREADED STUD(S)
  • Frequency Bandwidth: 6000.0 KILOHERTZ NOMINAL
  • FSC Application Data: SYNCHRONIZER,REMOTE CONTROL SYSTEM,GUIDED MISSILE
  • Mounting Provision Arrangement Style: 2 POSITION IN-LINE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Delay Line, cataloged under National Stock Number 5999-00-958-7769, 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 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 30 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: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-00-958-7769
Primary Part Number575R991H02
Item NameDelay Line
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
StatusCANCELLED
Thread Size and Series/type Designator0.112-40 UNIFIED NATIONAL COARSE (UNC)
Body Depth0.575 INCHES NOMINAL IN
Unable to DecodeUNABLE TO DECODE
Mounting FacilityTHREADED STUD(S)
Frequency Bandwidth6000.0 KILOHERTZ NOMINAL
FSC Application DataSYNCHRONIZER,REMOTE CONTROL SYSTEM,GUIDED MISSILE
Mounting Provision Arrangement Style2 POSITION IN-LINE
Terminal Type and Quantity2 SOLDER STUD
Mounting Facility Quantity2
Surface TreatmentSILVER OVERALL
Surface FinishRIBBED
Individual Section Quantity1
Body StyleRECTANGULAR
Operating Temp Range-65.0 TO 125.0 CELSIUS DEGC
Body Width0.599 INCHES NOMINAL IN
Longest Horizontal Distance Between Mounting Centers1.000 INCHES NOMINAL IN
Frequency Rating30.000 MEGAHERTZ NOMINAL
Thread Class2A A
Body Length1.940 INCHES NOMINAL IN
Thread Size and Series/type Designator0.112-40 UNIFIED NATIONAL COARSE (UNC)
Body Depth0.575 INCHES NOMINAL IN
Unable to DecodeUNABLE TO DECODE
Mounting FacilityTHREADED STUD(S)
Frequency Bandwidth6000.0 KILOHERTZ NOMINAL
FSC Application DataSYNCHRONIZER,REMOTE CONTROL SYSTEM,GUIDED MISSILE
Mounting Provision Arrangement Style2 POSITION IN-LINE
Terminal Type and Quantity2 SOLDER STUD
Mounting Facility Quantity2
Surface TreatmentSILVER OVERALL
Surface FinishRIBBED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Shelf Life Code0
Criticality CodeN
Unit of IssueEA
SMR CodeJN
Weight0.1000 lbs
Cube0.0069 cu ft
Verified Substitutes 5
5985-00-357-45560999200003 INTERCHANGEABLE
Antenna Kit
Riimic, Llc Dba Sunair Electronics
2805-00-732-646699920 INTERCHANGEABLE
Piston,internal Combustion Engin
Briggs and Stratton Corp
4820-01-139-9912 INTERCHANGEABLE
Disk,valve
6810-01-381-7201 INTERCHANGEABLE
Chemical Micron Fil
5305-01-396-728599920 INTERCHANGEABLE
Screw,cap,hexagon Head
Deutz Corporation
Cross-Reference Index
Part NumberManufacturer
575R991H02 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
99920 St Olektron Corp (USA)
Related Parts
5985-00-357-4556INTERCHANGEABLE
ANTENNA KIT
0999200003
2805-00-732-6466INTERCHANGEABLE
PISTON,INTERNAL COMBUSTION ENGIN
99920
4820-01-139-9912INTERCHANGEABLE
DISK,VALVE
6810-01-381-7201INTERCHANGEABLE
CHEMICAL MICRON FIL
5305-01-396-7285INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
99920

Frequently Asked Questions

What is NSN 5999-00-958-7769?

NSN 5999-00-958-7769 is a Delay Line, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5999 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5999-00-958-7769?

NSN 5999-00-958-7769 has 2 cross-referenced part numbers: 575R991H02 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 99920 (St Olektron Corp).

What NSN replaces 5999-00-958-7769?

There are 5 known substitutes for 5999-00-958-7769: 5985-00-357-4556, 2805-00-732-6466, 4820-01-139-9912 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 575R991H02?

Key specifications for 575R991H02: Thread Size and Series/type Designator: 0.112-40 UNIFIED NATIONAL COARSE (UNC); Body Depth: 0.575 INCHES NOMINAL IN; Unable to Decode: UNABLE TO DECODE; Mounting Facility: THREADED STUD(S). 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-00-958-7769 still in active supply?

NSN 5999-00-958-7769 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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