PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB571TYPEA6Nut,plain,hexagon

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-266-0341 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-266-0341 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-266-0341. Primary manufacturer part number: FFB571TYPEA6.
Features
  • Nut,plain,hexagon — FSC 5310
  • Thread Series: UNF
  • Bearing Surface Type: CHAMFERED
  • Nominal Thread Size: 0.312 INCHES IN
  • Thread Quantity Per Inch: 24
  • Material: STEEL OVERALL
  • Material Document and Classification: FF-N-836 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Nondefinitive Spec/std Data: A6 TYPE
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 5310-00-266-0341, 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 12 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
NSN5310-00-266-0341
Primary Part NumberFFB571TYPEA6
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Thread SeriesUNF
Bearing Surface TypeCHAMFERED
Nominal Thread Size0.312 INCHES IN
Thread Quantity Per Inch24
MaterialSTEEL OVERALL
Material Document and ClassificationFF-N-836 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nondefinitive Spec/std DataA6 TYPE
Width Across Flats0.562 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Thread Class2B
Nut Height0.172 INCHES NOMINAL IN
Nut StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5310-00-208-0634 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
5310-00-266-0344 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
5310-00-266-0342INTERCHANGEABLE
NUT,PLAIN,HEXAGON
04-953
5310-00-266-0343INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-0344INTERCHANGEABLE
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 5310-00-266-0341?

NSN 5310-00-266-0341 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 5310-00-266-0341?

NSN 5310-00-266-0341 has 1 cross-referenced part number: FFB571TYPEA6 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-266-0341?

There are 9 known substitutes for 5310-00-266-0341: 5310-00-208-0634, 5310-00-266-0342, 5310-00-266-0343 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB571TYPEA6?

Key specifications for FFB571TYPEA6: Thread Series: UNF; Bearing Surface Type: CHAMFERED; Nominal Thread Size: 0.312 INCHES IN; Thread Quantity Per Inch: 24. 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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