PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB571ABolt,machine

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5306-00-141-2844 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-141-2844 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-141-2844. Primary manufacturer part number: FFB571A.
Features
  • Bolt,machine — FSC 5306
  • Features Provided: FINISHED HEAD
  • Head Height: 0.320 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
  • Thread Class: 3A A
  • Thread Quantity Per Inch: 24
  • Fastener Length: 1.375 INCHES NOMINAL IN
  • Thread Series Designator: UNF
  • Nominal Thread Diameter: 0.375 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-141-2844, is classified within Federal Supply Class 5306 (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 13 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-00-141-2844
Primary Part NumberFFB571A
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Features ProvidedFINISHED HEAD
Head Height0.320 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
Thread Class3A A
Thread Quantity Per Inch24
Fastener Length1.375 INCHES NOMINAL IN
Thread Series DesignatorUNF
Nominal Thread Diameter0.375 INCHES IN
Thread DirectionRIGHT-HAND
MaterialSTEEL OVERALL
Width Between Flats0.613 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Nondefinitive Spec/std DataB3 TYPE
Thread Length0.875 INCHES MINIMUM IN
Head StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5310-00-012-0367 INTERCHANGEABLE
Nut,plain,hexagon
5306-00-576-5638 INTERCHANGEABLE
Bolt,machine
Cross-Reference Index
Part NumberManufacturer
FFB571A Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5310-00-012-0367INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5306-00-576-5638INTERCHANGEABLE
BOLT,MACHINE

Frequently Asked Questions

What is NSN 5306-00-141-2844?

NSN 5306-00-141-2844 is a Bolt,machine, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-00-141-2844?

NSN 5306-00-141-2844 has 1 cross-referenced part number: FFB571A (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 5306-00-141-2844?

There are 2 known substitutes for 5306-00-141-2844: 5310-00-012-0367, 5306-00-576-5638. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB571A?

Key specifications for FFB571A: Features Provided: FINISHED HEAD; Head Height: 0.320 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN; Thread Class: 3A A; Thread Quantity Per Inch: 24. 13 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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