PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB571TYPEA6Nut,plain,hexagon

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-266-0344 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-266-0344 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-266-0344. Primary manufacturer part number: FFB571TYPEA6.
Features
  • Nut,plain,hexagon — FSC 5310
  • Nut Height: 0.297 INCHES NOMINAL IN
  • Thread Series: UNF
  • Bearing Surface Type: CHAMFERED
  • Thread Quantity Per Inch: 20
  • Nominal Thread Size: 0.500 INCHES IN
  • Nondefinitive Spec/std Data: A6 TYPE
  • Material: STEEL OVERALL
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 5310-00-266-0344, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-266-0344
Primary Part NumberFFB571TYPEA6
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Nut Height0.297 INCHES NOMINAL IN
Thread SeriesUNF
Bearing Surface TypeCHAMFERED
Thread Quantity Per Inch20
Nominal Thread Size0.500 INCHES IN
Nondefinitive Spec/std DataA6 TYPE
MaterialSTEEL OVERALL
Thread DirectionRIGHT-HAND
Width Across Flats0.813 INCHES NOMINAL IN
Nut StyleHEXAGON
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5310-00-208-0634 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-0341 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-034204-953 INTERCHANGEABLE
Nut,plain,hexagon
Dresser Industries Inc Leroi Div
5310-00-266-0343 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-0347HLJF2H INTERCHANGEABLE
Nut,plain,hexagon
Titan Wheel Corporation of Illinois
5310-00-266-0349 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-4157 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-4178 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-4179 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
FFB571TYPEA6 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-208-0634INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-0341INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-0342INTERCHANGEABLE
NUT,PLAIN,HEXAGON
04-953
5310-00-266-0343INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-0347INTERCHANGEABLE
NUT,PLAIN,HEXAGON
HLJF2H
5310-00-266-0349INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-4157INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-4178INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-4179INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-266-0344?

NSN 5310-00-266-0344 is a Nut,plain,hexagon, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-266-0344?

NSN 5310-00-266-0344 has 1 cross-referenced part number: FFB571TYPEA6 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-266-0344?

There are 9 known substitutes for 5310-00-266-0344: 5310-00-208-0634, 5310-00-266-0341, 5310-00-266-0342 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB571TYPEA6?

Key specifications for FFB571TYPEA6: Nut Height: 0.297 INCHES NOMINAL IN; Thread Series: UNF; Bearing Surface Type: CHAMFERED; Thread Quantity Per Inch: 20. 11 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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