PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB571TYPEA2CLASSCNut,plain,hexagon

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-265-9221 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-265-9221 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-265-9221. Primary manufacturer part number: FFB571TYPEA2CLASSC.
Features
  • Nut,plain,hexagon — FSC 5310
  • Nut Height: 0.969 INCHES NOMINAL IN
  • Nut Style: HEXAGON
  • Thread Quantity Per Inch: 12
  • Nominal Thread Size: 1.125 INCHES IN
  • Thread Series: UNF
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Nondefinitive Spec/std Data: A2 TYPE AND C CLASS
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 5310-00-265-9221, 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-265-9221
Primary Part NumberFFB571TYPEA2CLASSC
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Nut Height0.969 INCHES NOMINAL IN
Nut StyleHEXAGON
Thread Quantity Per Inch12
Nominal Thread Size1.125 INCHES IN
Thread SeriesUNF
Bearing Surface TypeCHAMFERED OR WASHER FACED
Nondefinitive Spec/std DataA2 TYPE AND C CLASS
MaterialSTEEL OVERALL
Width Across Flats1.688 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5310-00-265-9217 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-265-9222 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-0377 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-0379 INTERCHANGEABLE
Nut,plain,hexagon
5310-00-266-0380 INTERCHANGEABLE
Nut,plain,hexagon
Cross-Reference Index
Part NumberManufacturer
FFB571TYPEA2CLASSC Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-265-9217INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-265-9222INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-0377INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-0379INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5310-00-266-0380INTERCHANGEABLE
NUT,PLAIN,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-265-9221?

NSN 5310-00-265-9221 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 5310-00-265-9221?

NSN 5310-00-265-9221 has 1 cross-referenced part number: FFB571TYPEA2CLASSC (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5310-00-265-9221?

There are 5 known substitutes for 5310-00-265-9221: 5310-00-265-9217, 5310-00-265-9222, 5310-00-266-0377 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB571TYPEA2CLASSC?

Key specifications for FFB571TYPEA2CLASSC: Nut Height: 0.969 INCHES NOMINAL IN; Nut Style: HEXAGON; Thread Quantity Per Inch: 12; Nominal Thread Size: 1.125 INCHES IN. 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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