PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILC38999Contact,electrical

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5999-00-540-8656 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-540-8656 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-540-8656. Primary manufacturer part number: MILC38999.
Features
  • Contact,electrical — FSC 5999
  • Test Data Document: 96906-MS27492 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
  • Material: COPPER ALLOY CONTACT
  • Style Designator: SOCKET CONTACT
  • Surface Treatment: GOLD CONTACT
  • Terminal Type and Quantity: 1 CRIMP END OPPOSITE CONTACT
  • Surface Treatment: GOLD BODY
  • Overall Diameter: 0.091 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
Applications
  • Applications requiring Copper Alloy Contact construction
General Description

The Contact,electrical, cataloged under National Stock Number 5999-00-540-8656, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 24 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5999-00-540-8656
Primary Part NumberMILC38999
Item NameContact,electrical
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Test Data Document96906-MS27492 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
MaterialCOPPER ALLOY CONTACT
Style DesignatorSOCKET CONTACT
Surface TreatmentGOLD CONTACT
Terminal Type and Quantity1 CRIMP END OPPOSITE CONTACT
Surface TreatmentGOLD BODY
Overall Diameter0.091 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
Pin Accommodation Length0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN
Cable Entrance Diameter0.042 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
Mounting MethodFORCE FIT
Pin Accommodation Diameter0.046 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN
MaterialCOPPER ALLOY BODY
Test Data Document96906-MS27492 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
MaterialCOPPER ALLOY CONTACT
Style DesignatorSOCKET CONTACT
Surface TreatmentGOLD CONTACT
Terminal Type and Quantity1 CRIMP END OPPOSITE CONTACT
Surface TreatmentGOLD BODY
Overall Diameter0.091 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
Pin Accommodation Length0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN
Cable Entrance Diameter0.042 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
Mounting MethodFORCE FIT
Pin Accommodation Diameter0.046 INCHES MINIMUM AND 0.048 INCHES MAXIMUM IN
MaterialCOPPER ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Weight0.0001 lbs
Cube0.0000 cu ft
Verified Substitutes 10
5999-00-152-9574M39029/56-351 SUCCESSOR
Contact,electrical
Sae International Dba Sae International
Contact,electrical
Contact,electrical
5999-00-229-8446M39029/58-362 SUCCESSOR
Contact,electrical
Sae International Dba Sae International
5999-01-011-1269M39029/57-356 SUCCESSOR
Contact,electrical
Sae International Dba Sae International
Contact,electrical
Contact,electrical
5999-01-071-5265M39029/75-416 SUCCESSOR
Contact,electrical
Sae International Dba Sae International
5999-01-072-4033M39029/28-409 SUCCESSOR
Contact,electrical
Sae International Dba Sae International
5999-01-158-1562M39029/57-357 SUCCESSOR
Contact,electrical
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
MILC38999 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS27492-20 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5999-00-152-9574SUCCESSOR
CONTACT,ELECTRICAL
M39029/56-351
5999-00-180-4274SUCCESSOR
CONTACT,ELECTRICAL
5999-00-180-4275SUCCESSOR
CONTACT,ELECTRICAL
5999-00-229-8446SUCCESSOR
CONTACT,ELECTRICAL
M39029/58-362
5999-01-011-1269SUCCESSOR
CONTACT,ELECTRICAL
M39029/57-356
5999-01-033-9195SUCCESSOR
CONTACT,ELECTRICAL
5999-01-034-0716SUCCESSOR
CONTACT,ELECTRICAL
5999-01-071-5265SUCCESSOR
CONTACT,ELECTRICAL
M39029/75-416
5999-01-072-4033SUCCESSOR
CONTACT,ELECTRICAL
M39029/28-409
5999-01-158-1562SUCCESSOR
CONTACT,ELECTRICAL
M39029/57-357

Frequently Asked Questions

What is NSN 5999-00-540-8656?

NSN 5999-00-540-8656 is a Contact,electrical, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-540-8656?

NSN 5999-00-540-8656 has 2 cross-referenced part numbers: MILC38999 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS27492-20 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5999-00-540-8656?

There are 10 known substitutes for 5999-00-540-8656: 5999-00-152-9574, 5999-00-180-4274, 5999-00-180-4275 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILC38999?

Key specifications for MILC38999: Overall Length: 0.518 INCHES NOMINAL IN; Test Data Document: 96906-MS27492 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).; Material: COPPER ALLOY CONTACT; Style Designator: SOCKET CONTACT. 26 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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