PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RG21AUCable,radio Frequency

Worcester Polytechnic Institute · NSN 6145-00-643-2107 · FSC 6145 · No Item Name Available
Verified by PartsTable
NSN 6145-00-643-2107 — this item is cataloged by the U.S. Government under National Stock Number 6145-00-643-2107. Primary manufacturer part number: RG21AU.
Features
  • Cable,radio Frequency — FSC 6145
  • Cross Section Outside Diameter: 0.332 INCHES NOMINAL IN
  • Conductor Arrangement and Quantity: 1 SINGLES
  • Voltage Rating: 2700.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
  • Electrical Resistance: 50.0 OHMS PER FOOT
  • Nominal Capacitance in Picofarads: 29.0 PER FOOT
  • Conductor Form: SOLID SINGLE CONDUCTOR
  • Conductor Quantity: 1
Applications
  • Electrical power distribution
  • Signal transmission
  • Equipment interconnection
General Description

The Cable,radio Frequency, cataloged under National Stock Number 6145-00-643-2107, is classified within Federal Supply Class 6145 (No Item Name Available) of the Electric Wire, Power, and Distribution Equipment group. The primary manufacturer of record is Worcester Polytechnic Institute. Government technical data includes 16 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6145-00-643-2107
Primary Part NumberRG21AU
Item NameCable,radio Frequency
FSC / FSG6145 / 61 — No Item Name Available
ManufacturerWorcester Polytechnic Institute
StatusCANCELLED
Cross Section Outside Diameter0.332 INCHES NOMINAL IN
Conductor Arrangement and Quantity1 SINGLES
Voltage Rating2700.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
Electrical Resistance50.0 OHMS PER FOOT
Nominal Capacitance in Picofarads29.0 PER FOOT
Conductor FormSOLID SINGLE CONDUCTOR
Conductor Quantity1
Cross-Sectional Shape StyleROUND
Cross Section Outside Diameter0.332 INCHES NOMINAL IN
Conductor Arrangement and Quantity1 SINGLES
Voltage Rating2700.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
Electrical Resistance50.0 OHMS PER FOOT
Nominal Capacitance in Picofarads29.0 PER FOOT
Conductor FormSOLID SINGLE CONDUCTOR
Conductor Quantity1
Cross-Sectional Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusCANCELLED
Successor5999-00-422-8491 (21-308)
HAZMATNo
Verified Substitutes 11
5999-00-422-849121-308 SUCCESSOR
Contact,electrical
Eaton Corp Opns & Technical Center
4820-00-243-4815 INTERCHANGEABLE
Valve,y
9540-00-585-7202 INTERCHANGEABLE
Angle,structural
2910-00-930-16577016001 INTERCHANGEABLE
Carburetor,float
General Motors Llc Dba General Motors Llc
5950-01-015-885621308 INTERCHANGEABLE
Transformer,power
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
3120-01-272-327521308 INTERCHANGEABLE
Bearing,sleeve
Parker Hannifin Corp Dba Pneutronics
4810-01-430-415521308-1004-1 INTERCHANGEABLE
Sleeve,drive,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4810-01-430-416121308-1003-1 INTERCHANGEABLE
Piston,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-469-266821308-001 INTERCHANGEABLE
Valve,dir Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
1005-01-503-002021308 INTERCHANGEABLE
Sling
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
RG21AU Worcester Polytechnic Institute (USA)
MILC17TYPERG21AU Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
21-308 Spirling Products Co (USA)
MILC17-14 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
SUCCESSOR 5999-00-422-8491 Contact,electrical · 21-308
4820-00-243-4815INTERCHANGEABLE
VALVE,Y
9540-00-585-7202INTERCHANGEABLE
ANGLE,STRUCTURAL
2910-00-930-1657INTERCHANGEABLE
CARBURETOR,FLOAT
7016001
5950-01-015-8856INTERCHANGEABLE
TRANSFORMER,POWER
21308
3120-01-272-3275INTERCHANGEABLE
BEARING,SLEEVE
21308
4810-01-430-4155INTERCHANGEABLE
SLEEVE,DRIVE,VALVE
21308-1004-1
4810-01-430-4161INTERCHANGEABLE
PISTON,VALVE
21308-1003-1
4820-01-469-2668INTERCHANGEABLE
VALVE,DIR CONTROL
21308-001
1005-01-503-0020INTERCHANGEABLE
SLING
21308
4930-01-528-9562INTERCHANGEABLE
CONTROL,DAMPER
21308

Frequently Asked Questions

What is NSN 6145-00-643-2107?

NSN 6145-00-643-2107 is a Cable,radio Frequency, manufactured by Worcester Polytechnic Institute, classified under FSC 6145 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6145-00-643-2107?

NSN 6145-00-643-2107 has 4 cross-referenced part numbers: RG21AU (Worcester Polytechnic Institute), MILC17TYPERG21AU (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 21-308 (Spirling Products Co), MILC17-14 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6145-00-643-2107?

There are 11 known substitutes for 6145-00-643-2107: 5999-00-422-8491, 4820-00-243-4815, 9540-00-585-7202 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of RG21AU?

Key specifications for RG21AU: Cross Section Outside Diameter: 0.332 INCHES NOMINAL IN; Conductor Arrangement and Quantity: 1 SINGLES; Voltage Rating: 2700.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR; Electrical Resistance: 50.0 OHMS PER FOOT. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6145-00-643-2107 still in active supply?

NSN 6145-00-643-2107 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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