PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB571TYPEA2CLASSCNut,plain,hexagon

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-265-9217 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-265-9217 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-265-9217. Primary manufacturer part number: FFB571TYPEA2CLASSC.
Features
  • Nut,plain,hexagon — FSC 5310
  • Width Across Flats: 0.813 INCHES NOMINAL IN
  • Nut Height: 0.844 INCHES NOMINAL IN
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Thread Quantity Per Inch: 20
  • Thread Series: UNF
  • Nominal Thread Size: 0.500 INCHES IN
  • 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 5310-00-265-9217, 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 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-265-9217
Primary Part NumberFFB571TYPEA2CLASSC
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Width Across Flats0.813 INCHES NOMINAL IN
Nut Height0.844 INCHES NOMINAL IN
Bearing Surface TypeCHAMFERED OR WASHER FACED
Thread Quantity Per Inch20
Thread SeriesUNF
Nominal Thread Size0.500 INCHES IN
MaterialSTEEL OVERALL
Nondefinitive Spec/std DataA2 TYPE AND C CLASS
Nut StyleHEXAGON
Thread Class2B
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3110-00-227-49504144895P1 INTERCHANGEABLE
Bearing,ball,pivot
General Electric Company
5310-00-265-9221 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
3030-00-529-0384 INTERCHANGEABLE
Belt,v
3110-01-042-2423C270 INTERCHANGEABLE
Bearing,ball,pivot
Rmb Miniature Bearings Inc
3220-01-142-2427S-290 INTERCHANGEABLE
Surfacer,woodworking
Newman Machine Co Inc Dba Newman-Whitney
4320-01-200-0612C270 INTERCHANGEABLE
Ring,wearing
Circor Naval Solutions Llc Dba Warren Pumps
Cross-Reference Index
Part NumberManufacturer
FFB571TYPEA2CLASSC Federal Specifications Promulgated by General Services Administration Washington DC (USA)
C270 Acco Industries Inc Sub of Babcock Intl Inc (USA)
S290 Cummins Inc. (USA)
Related Parts
3110-00-227-4950INTERCHANGEABLE
BEARING,BALL,PIVOT
4144895P1
5310-00-265-9221INTERCHANGEABLE
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
3030-00-529-0384INTERCHANGEABLE
BELT,V
3110-01-042-2423INTERCHANGEABLE
BEARING,BALL,PIVOT
C270
3220-01-142-2427INTERCHANGEABLE
SURFACER,WOODWORKING
S-290
4320-01-200-0612INTERCHANGEABLE
RING,WEARING
C270
5325-01-257-6996INTERCHANGEABLE
FASTENER ASSEMBLY,TURNLOCK
FE7500-8-B-4
3460-01-353-8109INTERCHANGEABLE
SLEEVE,EXPANSION MANDREL
S-290

Frequently Asked Questions

What is NSN 5310-00-265-9217?

NSN 5310-00-265-9217 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: cancelled.

What are the part numbers for NSN 5310-00-265-9217?

NSN 5310-00-265-9217 has 3 cross-referenced part numbers: FFB571TYPEA2CLASSC (Federal Specifications Promulgated by General Services Administration Washington DC), C270 (Acco Industries Inc Sub of Babcock Intl Inc), S290 (Cummins Inc.).

What NSN replaces 5310-00-265-9217?

There are 12 known substitutes for 5310-00-265-9217: 3110-00-227-4950, 5310-00-265-9221, 5310-00-265-9222 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB571TYPEA2CLASSC?

Key specifications for FFB571TYPEA2CLASSC: Width Across Flats: 0.813 INCHES NOMINAL IN; Nut Height: 0.844 INCHES NOMINAL IN; Bearing Surface Type: CHAMFERED OR WASHER FACED; Thread Quantity Per Inch: 20. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-265-9217 still in active supply?

NSN 5310-00-265-9217 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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