PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M45913/3-20FG8CNut,self-Locking,hexagon

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-01-522-0301 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-522-0301 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-522-0301. Primary manufacturer part number: M45913/3-20FG8C.
Features
  • Nut,self-Locking,hexagon — FSC 5310
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Thread Direction: RIGHT-HAND
  • Material: STEEL OVERALL
  • Thread Quantity Per Inch: 12
  • Locking Feature: PREVAILING TORQUE ALL METAL DESIGN
  • Thread Class: 3B
  • Bearing Surface Type: CHAMFERED
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-522-0301, 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 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-522-0301
Primary Part NumberM45913/3-20FG8C
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 SeriesUNIFIED NATIONAL COARSE (UNC)
Thread DirectionRIGHT-HAND
MaterialSTEEL OVERALL
Thread Quantity Per Inch12
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Thread Class3B
Bearing Surface TypeCHAMFERED
Nut Height1.125 INCHES NOMINAL IN
Nominal Thread Size1.250 INCHES IN
Nut StyleHEXAGON
Width Across Flats1.801 INCHES MINIMUM AND 1.815 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-340-4953 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-00-814-0672 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-00-935-3750 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-01-032-2319 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-01-137-7062 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-01-231-7459 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-01-249-0904 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-01-253-0058 INTERCHANGEABLE
Nut,self-Locking,extended Washer
5310-01-374-0508 INTERCHANGEABLE
Nut,self-Locking,hexagon
5310-01-461-4610 INTERCHANGEABLE
Nut,self-Locking,hexagon
Cross-Reference Index
Part NumberManufacturer
M45913/3-20FG8C Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-45913/3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-45913 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-340-4953INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-00-814-0672INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-00-935-3750INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-032-2319INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-137-7062INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-231-7459INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-249-0904INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-253-0058INTERCHANGEABLE
NUT,SELF-LOCKING,EXTENDED WASHER
5310-01-374-0508INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-461-4610INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-501-3086INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5310-01-501-3090INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON

Frequently Asked Questions

What is NSN 5310-01-522-0301?

NSN 5310-01-522-0301 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 5310-01-522-0301?

NSN 5310-01-522-0301 has 3 cross-referenced part numbers: M45913/3-20FG8C (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-45913/3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-45913 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-01-522-0301?

There are 12 known substitutes for 5310-01-522-0301: 5310-00-340-4953, 5310-00-814-0672, 5310-00-935-3750 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M45913/3-20FG8C?

Key specifications for M45913/3-20FG8C: Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Material: STEEL OVERALL; Thread Quantity Per Inch: 12. 12 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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