PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55344Nut,plain,hexagon

Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple · NSN 5310-00-685-1997 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-685-1997 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-685-1997. Primary manufacturer part number: 55344.
Features
  • Nut,plain,hexagon — FSC 5310
  • Material: STEEL OVERALL
  • Thread Class: 2B
  • Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
  • Thread Series: UNF
  • Thread Quantity Per Inch: 24
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Bearing Surface Finish: 125.0 MICROINCHES
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-685-1997, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple. Government technical data includes 16 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-685-1997
Primary Part Number55344
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
StatusCANCELLED
MaterialSTEEL OVERALL
Thread Class2B
Hardness Rating25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
Thread SeriesUNF
Thread Quantity Per Inch24
Bearing Surface TypeCHAMFERED OR WASHER FACED
Bearing Surface Finish125.0 MICROINCHES
Nominal Thread Size0.375 INCHES IN
Hole Configuration StyleCONFIGURATION B
Width Across Flats0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
Nut Height0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN
Nut StyleHEXAGON
Hole Type and Quantity2 DRILLED
Thread DirectionRIGHT-HAND
Drilled Hole Diameter0.031 INCHES NOMINAL IN
Surface TreatmentCADMIUM OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5905-00-114-9852S-40-5033 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Raytheon Company Dba Raytheon Co
3110-00-198-2462W204PPFS50381 INTERCHANGEABLE
Bearing,ball,annular
Timken Co Div the Timken Company
5340-01-096-716710350-A-1032-2 INTERCHANGEABLE
Handle,bow
Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware
5330-01-239-0593416313 INTERCHANGEABLE
Seal,plain Encased
Federal-Mogul Corp Government Sales Dept
Cross-Reference Index
Part NumberManufacturer
55344 PRIMARY Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA)
55344 Northrop Grumman Systems Corporation Div Es Defensive Systems Division (USA)
Related Parts
5905-00-114-9852INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
S-40-5033
3110-00-198-2462INTERCHANGEABLE
BEARING,BALL,ANNULAR
W204PPFS50381
5340-01-096-7167INTERCHANGEABLE
HANDLE,BOW
10350-A-1032-2
5330-01-239-0593INTERCHANGEABLE
SEAL,PLAIN ENCASED
416313

Frequently Asked Questions

What is NSN 5310-00-685-1997?

NSN 5310-00-685-1997 is a Nut,plain,hexagon, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-685-1997?

NSN 5310-00-685-1997 has 2 cross-referenced part numbers: 55344 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple), 55344 (Northrop Grumman Systems Corporation Div Es Defensive Systems Division).

What NSN replaces 5310-00-685-1997?

There are 4 known substitutes for 5310-00-685-1997: 5905-00-114-9852, 3110-00-198-2462, 5340-01-096-7167 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 55344?

Key specifications for 55344: Material: STEEL OVERALL; Thread Class: 2B; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Thread Series: UNF. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-685-1997 still in active supply?

NSN 5310-00-685-1997 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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