PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C235A231-16Contact,electrical

Telephonics Corp · NSN 5999-01-181-3611 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-181-3611 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-181-3611. Primary manufacturer part number: C235A231-16.
Features
  • Contact,electrical — FSC 5999
  • Surface Treatment: GOLD AND NICKEL CONTACT
  • Surface Treatment Document and Classification: MIL-G-45204 MIL SPEC 1ST TREATMENT RESPONSE AND QQ-N-290 FED SPEC 2ND TREATMENT RESPONSE CONTACT
  • Material Document and Classification: MIL-C-50 MIL SPEC SINGLE MATERIAL RESPONSE CONTACT
  • Pin Diameter: 0.040 INCHES NOMINAL IN
  • Mounting Method: SPRING TENSION
  • Overall Diameter: 0.066 INCHES MAXIMUM IN
  • Terminal Type and Quantity: 1 CRIMP AXIALLY AT ONE END
Applications
  • Applications requiring Copper Alloy Contact construction
General Description

The Contact,electrical, cataloged under National Stock Number 5999-01-181-3611, 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 Telephonics Corp. Government technical data includes 24 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-181-3611
Primary Part NumberC235A231-16
Item NameContact,electrical
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerTelephonics Corp
StatusCANCELLED
Surface TreatmentGOLD AND NICKEL CONTACT
Surface Treatment Document and ClassificationMIL-G-45204 MIL SPEC 1ST TREATMENT RESPONSE AND QQ-N-290 FED SPEC 2ND TREATMENT RESPONSE CONTACT
Material Document and ClassificationMIL-C-50 MIL SPEC SINGLE MATERIAL RESPONSE CONTACT
Pin Diameter0.040 INCHES NOMINAL IN
Mounting MethodSPRING TENSION
Overall Diameter0.066 INCHES MAXIMUM IN
Terminal Type and Quantity1 CRIMP AXIALLY AT ONE END
MaterialCOPPER ALLOY CONTACT
Precious Material and LocationCONTACT SURFACES GOLD
Precious Material and Weight0.005 GOLD GRAINS, TROY
Precious MaterialGOLD
Style DesignatorPIN CRIMP CONTACT
Surface TreatmentGOLD AND NICKEL CONTACT
Surface Treatment Document and ClassificationMIL-G-45204 MIL SPEC 1ST TREATMENT RESPONSE AND QQ-N-290 FED SPEC 2ND TREATMENT RESPONSE CONTACT
Material Document and ClassificationMIL-C-50 MIL SPEC SINGLE MATERIAL RESPONSE CONTACT
Pin Diameter0.040 INCHES NOMINAL IN
Mounting MethodSPRING TENSION
Overall Diameter0.066 INCHES MAXIMUM IN
Terminal Type and Quantity1 CRIMP AXIALLY AT ONE END
MaterialCOPPER ALLOY CONTACT
Precious Material and LocationCONTACT SURFACES GOLD
Precious Material and Weight0.005 GOLD GRAINS, TROY
Precious MaterialGOLD
Style DesignatorPIN CRIMP CONTACT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Weight0.0100 lbs
Cube0.0035 cu ft
Verified Substitutes 3
No Item Name Available
5915-00-507-364255053-4 INTERCHANGEABLE
Capacitor-Resistor
Ambac International Corporation Div Ambac International
5950-01-006-7862623-5744-001 INTERCHANGEABLE
Transformer,radio Frequency
Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems
Cross-Reference Index
Part NumberManufacturer
1-203374-3 Te Connectivity Corporation (USA)
203874-1 Te Connectivity Corporation (USA)
C235A231-16 PRIMARY Telephonics Corp (USA)
E103-1 Raytheon Technical Services Company (USA)
Related Parts
5999-01-157-0658SUCCESSOR
NO ITEM NAME AVAILABLE
5915-00-507-3642INTERCHANGEABLE
CAPACITOR-RESISTOR
55053-4
5950-01-006-7862INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
623-5744-001

Frequently Asked Questions

What is NSN 5999-01-181-3611?

NSN 5999-01-181-3611 is a Contact,electrical, manufactured by Telephonics Corp, classified under FSC 5999 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5999-01-181-3611?

NSN 5999-01-181-3611 has 4 cross-referenced part numbers: 1-203374-3 (Te Connectivity Corporation), 203874-1 (Te Connectivity Corporation), C235A231-16 (Telephonics Corp), E103-1 (Raytheon Technical Services Company).

What NSN replaces 5999-01-181-3611?

There are 3 known substitutes for 5999-01-181-3611: 5999-01-157-0658, 5915-00-507-3642, 5950-01-006-7862. Verify interchangeability with system specifications before substitution.

What are the specifications of C235A231-16?

Key specifications for C235A231-16: Surface Treatment: GOLD AND NICKEL CONTACT; Surface Treatment Document and Classification: MIL-G-45204 MIL SPEC 1ST TREATMENT RESPONSE AND QQ-N-290 FED SPEC 2ND TREATMENT RESPONSE CONTACT; Material Document and Classification: MIL-C-50 MIL SPEC SINGLE MATERIAL RESPONSE CONTACT; Pin Diameter: 0.040 INCHES NOMINAL IN. 26 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5999-01-181-3611 still in active supply?

NSN 5999-01-181-3611 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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