PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS39081-40Locknut,electrical Conduit

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5975-00-296-0539 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-00-296-0539 — this item is cataloged by the U.S. Government under National Stock Number 5975-00-296-0539. Primary manufacturer part number: MS39081-40.
Features
  • Locknut,electrical Conduit — FSC 5975
  • Conduit Size Accommodated: 2.500 INCHES NOMINAL IN
  • Material: ALUMINUM
  • Surface Treatment: CADMIUM
  • Thread Type: STRAIGHT
  • Overall Thickness: 0.250 INCHES NOMINAL IN
  • Drive Type: HEXAGON
  • Width Across Flats: 3.375 INCHES NOMINAL IN
Applications
  • Applications requiring Aluminum construction
General Description

The Locknut,electrical Conduit, cataloged under National Stock Number 5975-00-296-0539, is classified within Federal Supply Class 5975 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 8 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5975-00-296-0539
Primary Part NumberMS39081-40
Item NameLocknut,electrical Conduit
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Conduit Size Accommodated2.500 INCHES NOMINAL IN
MaterialALUMINUM
Surface TreatmentCADMIUM
Thread TypeSTRAIGHT
Overall Thickness0.250 INCHES NOMINAL IN
Drive TypeHEXAGON
Width Across Flats3.375 INCHES NOMINAL IN
Thread Size3-16
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5975-00-208-5413 INTERCHANGEABLE
Locknut,electrical Conduit
5975-00-240-2646 INTERCHANGEABLE
Locknut,electrical Conduit
5975-00-280-6079 INTERCHANGEABLE
Locknut,electrical Conduit
5975-00-280-6083 INTERCHANGEABLE
Locknut,electrical Conduit
5975-00-296-0537 INTERCHANGEABLE
Locknut,electrical Conduit
5975-00-432-5526 INTERCHANGEABLE
Locknut,electrical Conduit
5975-00-614-3555 INTERCHANGEABLE
Locknut,electrical Conduit
5975-00-793-5550 INTERCHANGEABLE
Locknut,electrical Conduit
Cross-Reference Index
Part NumberManufacturer
MS39081-40 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
AN3066-40 Aeronautical Standards Group Dept of Navy and Air Force (USA)
AN3066 Aeronautical Standards Group Dept of Navy and Air Force (USA)
Related Parts
5975-00-208-5413INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
5975-00-240-2646INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
5975-00-280-6079INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
5975-00-280-6083INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
5975-00-296-0537INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
5975-00-432-5526INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
5975-00-614-3555INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT
5975-00-793-5550INTERCHANGEABLE
LOCKNUT,ELECTRICAL CONDUIT

Frequently Asked Questions

What is NSN 5975-00-296-0539?

NSN 5975-00-296-0539 is a Locknut,electrical Conduit, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5975 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5975-00-296-0539?

NSN 5975-00-296-0539 has 3 cross-referenced part numbers: MS39081-40 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), AN3066-40 (Aeronautical Standards Group Dept of Navy and Air Force), AN3066 (Aeronautical Standards Group Dept of Navy and Air Force).

What NSN replaces 5975-00-296-0539?

There are 8 known substitutes for 5975-00-296-0539: 5975-00-208-5413, 5975-00-240-2646, 5975-00-280-6079 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS39081-40?

Key specifications for MS39081-40: Conduit Size Accommodated: 2.500 INCHES NOMINAL IN; Material: ALUMINUM; Surface Treatment: CADMIUM; Thread Type: STRAIGHT. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5975-00-296-0539 still in active supply?

NSN 5975-00-296-0539 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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