PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

UG631AUConnector,receptacle,electrical

Joint Electronics Type Designation System · NSN 5935-00-687-1301 · FSC 5935 · No Item Name Available
Verified by PartsTable
NSN 5935-00-687-1301 — this item is cataloged by the U.S. Government under National Stock Number 5935-00-687-1301. Primary manufacturer part number: UG631AU.
Features
  • Connector,receptacle,electrical — FSC 5935
  • Overall Diameter: 1.051 INCHES MINIMUM AND 1.083 INCHES MAXIMUM IN
  • Cable Entrance Diameter: 0.257 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
  • Distance From Mounting Shoulder to Front Face: 0.585 INCHES NOMINAL IN
  • Environmental Protection: SALT WATER RESISTANT
  • Included Contact Type: COAXIAL SOCKET SINGLE MATING END SINGLE CONTACT GROUPING
  • Shell Surface Treatment: SILVER
Applications
  • Electrical interconnection
  • Signal interface mating
  • Quick-disconnect coupling
General Description

The Connector,receptacle,electrical, cataloged under National Stock Number 5935-00-687-1301, 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 29 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5935-00-687-1301
Primary Part NumberUG631AU
Item NameConnector,receptacle,electrical
FSC / FSG5935 / 59 — No Item Name Available
ManufacturerJoint Electronics Type Designation System
StatusCANCELLED
Overall Diameter1.051 INCHES MINIMUM AND 1.083 INCHES MAXIMUM IN
Cable Entrance Diameter0.257 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Distance From Mounting Shoulder to Front Face0.585 INCHES NOMINAL IN
Environmental ProtectionSALT WATER RESISTANT
Included Contact TypeCOAXIAL SOCKET SINGLE MATING END SINGLE CONTACT GROUPING
Shell Surface TreatmentSILVER
Contact Surface Treatment Document and ClassificationQQ-S-365 FED SPEC SINGLE TREATMENT RESPONSE SINGLE MATING END SINGLE CONTACT GROUPING
Shell TypeSOLID
Included Contact Quantity1 SINGLE MATING END SINGLE CONTACT GROUPING
Insert MaterialPLASTIC POLYTETRAFLUOROETHYLENE SINGLE MATING END
Connector Locking MethodBAYONET LATCH
Nominal Thread Size0.625 INCHES IN
Connector Cable Strain Relief MethodCOMPRESSION NUT
Mating End Quantity1
Body StyleSTRAIGHT SHAPE, EXTERNAL COUPLING
Terminal LocationBACK SINGLE MATING END SINGLE CONTACT GROUPING
Contact RemovabilityNONREMOVABLE SINGLE MATING END SINGLE CONTACT GROUPING
Shell Surface Treatment Document and ClassificationQQ-S-365 FED SPEC SINGLE TREATMENT RESPONSE
Bushing Accommodation Hole ShapeROUND
Threaded Device TypeMOUNTING BUSHING
Precious Material and LocationCONTACT SURFACES AND SHELL SILVER
Specification/standard Data81349-MIL-C-3989 GOVERNMENT SPECIFICATION
Contact Surface TreatmentSILVER SINGLE MATING END SINGLE CONTACT GROUPING
Thread Class2A A
Thread Series DesignatorUNEF
Insert Material Document and ClassificationMIL-P-14077,CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE SINGLE MATING END
Test Data Document81349-MIL-C-3989 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Precious MaterialGOLD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5935-00-577-2665 INTERCHANGEABLE
Connector,plug,electrical
5935-00-636-5905 INTERCHANGEABLE
Connector,receptacle,electrical
5935-00-681-3737 INTERCHANGEABLE
Connector,plug,electrical
5935-00-702-0127 INTERCHANGEABLE
Connector,receptacle,electrical
5935-00-702-1207 INTERCHANGEABLE
Connector,plug,electrical
5935-00-721-2675 INTERCHANGEABLE
Connector,plug,electrical
5935-00-807-9985 INTERCHANGEABLE
Connector,receptacle,electrical
5935-00-892-9172 INTERCHANGEABLE
Connector,plug,electrical
Cross-Reference Index
Part NumberManufacturer
UG631AU Joint Electronics Type Designation System (USA)
MS35279-631A Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MILC3989 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5935-00-577-2665INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5935-00-636-5905INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5935-00-681-3737INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5935-00-702-0127INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5935-00-702-1207INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5935-00-721-2675INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5935-00-807-9985INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5935-00-892-9172INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL

Frequently Asked Questions

What is NSN 5935-00-687-1301?

NSN 5935-00-687-1301 is a Connector,receptacle,electrical, manufactured by Joint Electronics Type Designation System, classified under FSC 5935 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5935-00-687-1301?

NSN 5935-00-687-1301 has 3 cross-referenced part numbers: UG631AU (Joint Electronics Type Designation System), MS35279-631A (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MILC3989 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5935-00-687-1301?

There are 8 known substitutes for 5935-00-687-1301: 5935-00-577-2665, 5935-00-636-5905, 5935-00-681-3737 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of UG631AU?

Key specifications for UG631AU: Overall Diameter: 1.051 INCHES MINIMUM AND 1.083 INCHES MAXIMUM IN; Cable Entrance Diameter: 0.257 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND; Distance From Mounting Shoulder to Front Face: 0.585 INCHES NOMINAL IN. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5935-00-687-1301 still in active supply?

NSN 5935-00-687-1301 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.
PartsTable Design LLC · partstable.com