PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M45913/1-4FS3Nut,self-Locking,hexagon

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-143-6102 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-143-6102 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-143-6102. Primary manufacturer part number: M45913/1-4FS3.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Thread Direction: RIGHT-HAND
  • Nut Style: HEXAGON
  • Material: STEEL COMP 303 NUT
  • Bearing Surface Finish: 125.0 MICROINCHES
  • Nominal Thread Size: 0.250 INCHES IN
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Width Across Flats: 0.428 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 303 Nut construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-143-6102, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives 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 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 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: Active.

Technical Specifications
ParameterValue
NSN5310-00-143-6102
Primary Part NumberM45913/1-4FS3
Item NameNut,self-Locking,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Thread DirectionRIGHT-HAND
Nut StyleHEXAGON
MaterialSTEEL COMP 303 NUT
Bearing Surface Finish125.0 MICROINCHES
Nominal Thread Size0.250 INCHES IN
Bearing Surface TypeCHAMFERED OR WASHER FACED
Width Across Flats0.428 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
Nut Height0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT
Temp Rating250.0 FAHRENHEIT NOMINAL DEGF
Thread SeriesUNF
Surface TreatmentPASSIVATE OVERALL EXCEPT INSERT
Thread Quantity Per Inch28
LubricationDRY FILM LUBRICANT
Thread Class2B
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5310-01-017-6518107304-104 INTERCHANGEABLE
Nut,plain,hexagon
Raytheon Company
5310-01-099-06961-4-28UNF2B INTERCHANGEABLE
Locknut
General Electric Company
5310-01-245-2590 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
M45913/1-4FS3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1-4-28UNF2B Zf Industrieantriebe Witten Gmbh (DEU)
MIL-DTL-45913/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1-4-28UNF28 Zf Industrieantriebe Witten Gmbh (DEU)
MS51922-6 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-01-017-6518INTERCHANGEABLE
NUT,PLAIN,HEXAGON
107304-104
5310-01-099-0696INTERCHANGEABLE
LOCKNUT
1-4-28UNF2B
5310-01-245-2590INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-143-6102?

NSN 5310-00-143-6102 is a Nut,self-Locking,hexagon, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-143-6102?

NSN 5310-00-143-6102 has 5 cross-referenced part numbers: M45913/1-4FS3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 1-4-28UNF2B (Zf Industrieantriebe Witten Gmbh), MIL-DTL-45913/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 1-4-28UNF28 (Zf Industrieantriebe Witten Gmbh), MS51922-6 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-143-6102?

There are 3 known substitutes for 5310-00-143-6102: 5310-01-017-6518, 5310-01-099-0696, 5310-01-245-2590. Verify interchangeability with system specifications before substitution.

What are the specifications of M45913/1-4FS3?

Key specifications for M45913/1-4FS3: Thread Direction: RIGHT-HAND; Nut Style: HEXAGON; Material: STEEL COMP 303 NUT; Bearing Surface Finish: 125.0 MICROINCHES. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com