PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

UG21UConnector,plug,electrical

Joint Electronics Type Designation System · NSN 5935-00-201-2321 · FSC 5935 · No Item Name Available
Verified by PartsTable
NSN 5935-00-201-2321 — this item is cataloged by the U.S. Government under National Stock Number 5935-00-201-2321. Primary manufacturer part number: UG21U.
Features
  • Connector,plug,electrical — FSC 5935
  • Cable Entrance Diameter: 0.437 INCHES NOMINAL IN
  • Overall Diameter: 0.781 INCHES NOMINAL IN
  • Included Contact Type: COAXIAL SOCKET SINGLE MATING END SINGLE CONTACT GROUPING
  • Thread Series Designator: UNEF
  • Included Contact Quantity: 1 SINGLE MATING END SINGLE CONTACT GROUPING
  • Insert Material: PLASTIC SINGLE MATING END
  • Radio Frequency Type Contact Characteristic Impedance in Ohms: 50.0 SINGLE MATING END SINGLE CONTACT GROUPING
Applications
  • Electrical interconnection
  • Signal interface mating
  • Quick-disconnect coupling
General Description

The Connector,plug,electrical, cataloged under National Stock Number 5935-00-201-2321, is classified within Federal Supply Class 5935 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Joint Electronics Type Designation System. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5935-00-201-2321
Primary Part NumberUG21U
Item NameConnector,plug,electrical
FSC / FSG5935 / 59 — No Item Name Available
ManufacturerJoint Electronics Type Designation System
StatusACTIVE
Cable Entrance Diameter0.437 INCHES NOMINAL IN
Overall Diameter0.781 INCHES NOMINAL IN
Included Contact TypeCOAXIAL SOCKET SINGLE MATING END SINGLE CONTACT GROUPING
Thread Series DesignatorUNEF
Included Contact Quantity1 SINGLE MATING END SINGLE CONTACT GROUPING
Insert MaterialPLASTIC SINGLE MATING END
Radio Frequency Type Contact Characteristic Impedance in Ohms50.0 SINGLE MATING END SINGLE CONTACT GROUPING
Shell MaterialCOPPER AND CHROMIUM
Shell TypeSOLID
Connector Locking MethodEXTERNALLY THREADED COUPLING NUT
Contact RemovabilityREMOVABLE SINGLE MATING END SINGLE CONTACT GROUPING
Nominal Thread Length0.625 INCHES IN
Terminal LocationBACK SINGLE MATING END SINGLE CONTACT GROUPING
Nominal Thread Size0.625 INCHES IN
Shell Surface TreatmentANODIZE
Terminal TypeCRIMP SINGLE MATING END SINGLE CONTACT GROUPING
Mating End Quantity1
Thread Class3A A
Threaded Device TypeCOUPLING FACILITY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5935-00-643-6675UG93AU INTERCHANGEABLE
Connector,receptacle,electrical
Joint Electronics Type Designation System
5935-00-928-3127 INTERCHANGEABLE
Connector,plug,electrical
5935-01-049-2238 INTERCHANGEABLE
Connector,plug,electrical
Cross-Reference Index
Part NumberManufacturer
UG21U Joint Electronics Type Designation System (USA)
RE49F402 Department of the Navy (USA)
UG21AU Joint Electronics Type Designation System (USA)
Related Parts
5935-00-643-6675INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
UG93AU
5935-00-928-3127INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5935-01-049-2238INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL

Frequently Asked Questions

What is NSN 5935-00-201-2321?

NSN 5935-00-201-2321 is a Connector,plug,electrical, manufactured by Joint Electronics Type Designation System, classified under FSC 5935 (No Item Name Available). Status: active.

What are the part numbers for NSN 5935-00-201-2321?

NSN 5935-00-201-2321 has 3 cross-referenced part numbers: UG21U (Joint Electronics Type Designation System), RE49F402 (Department of the Navy), UG21AU (Joint Electronics Type Designation System).

What NSN replaces 5935-00-201-2321?

There are 3 known substitutes for 5935-00-201-2321: 5935-00-643-6675, 5935-00-928-3127, 5935-01-049-2238. Verify interchangeability with system specifications before substitution.

What are the specifications of UG21U?

Key specifications for UG21U: Cable Entrance Diameter: 0.437 INCHES NOMINAL IN; Overall Diameter: 0.781 INCHES NOMINAL IN; Included Contact Type: COAXIAL SOCKET SINGLE MATING END SINGLE CONTACT GROUPING; Thread Series Designator: UNEF. 20 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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