PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFB575TYPE2Bolt,machine

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5306-00-660-3299 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-660-3299 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-660-3299. Primary manufacturer part number: FFB575TYPE2.
Features
  • Bolt,machine — FSC 5306
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Thread Quantity Per Inch: 13
  • Head Height: 0.302 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
  • Width Between Flats: 0.725 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
  • Thread Length: 1.250 INCHES MINIMUM IN
  • Features Provided: UNFINISHED HEAD
  • Grip Length: 0.500 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy 655 Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-00-660-3299, 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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5306-00-660-3299
Primary Part NumberFFB575TYPE2
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Thread Quantity Per Inch13
Head Height0.302 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
Width Between Flats0.725 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
Thread Length1.250 INCHES MINIMUM IN
Features ProvidedUNFINISHED HEAD
Grip Length0.500 INCHES NOMINAL IN
Fastener Length1.750 INCHES NOMINAL IN
Head StyleHEXAGON
MaterialCOPPER ALLOY 655 OVERALL
Thread Class2A A
Nominal Thread Diameter0.500 INCHES IN
Thread DirectionRIGHT-HAND
Material Document and ClassificationQQ-C-591,1/2H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nondefinitive Spec/std Data2 TYPE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
No Item Name Available
1680-00-535-449551142 INTERCHANGEABLE
Support,actuator,sw
L3harris Technologies, Inc Div Space & Airborne Systems
5306-00-660-3317 INTERCHANGEABLE
Bolt,machine
5306-00-660-3318 INTERCHANGEABLE
Bolt,machine
5306-00-660-3335 INTERCHANGEABLE
Bolt,machine
5306-00-660-3341 INTERCHANGEABLE
Bolt,machine
6680-01-195-334351142 INTERCHANGEABLE
Indicator,sight,liquid
Leroi International Inc Dba Compair Leroi
5330-01-223-48065-1142 INTERCHANGEABLE
Packing,preformed
Bird Electronic Corporation Div Bird Electronic Corp
7510-01-284-857662321 INTERCHANGEABLE
Ribbon,inking
Inmac Usa Microwarehouse Inc of Connecticut
5306-01-631-04851G51142 INTERCHANGEABLE
Bolt,machine
Getz Fire Equipment Company Dba Getz Fire Equipment Co
Cross-Reference Index
Part NumberManufacturer
FFB575TYPE2 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
51-142 Hardie-Tynes Co., Inc. (USA)
Related Parts
5306-00-660-1822SUCCESSOR
NO ITEM NAME AVAILABLE
1680-00-535-4495INTERCHANGEABLE
SUPPORT,ACTUATOR,SW
51142
5306-00-660-3317INTERCHANGEABLE
BOLT,MACHINE
5306-00-660-3318INTERCHANGEABLE
BOLT,MACHINE
5306-00-660-3335INTERCHANGEABLE
BOLT,MACHINE
5306-00-660-3341INTERCHANGEABLE
BOLT,MACHINE
6680-01-195-3343INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
51142
5330-01-223-4806INTERCHANGEABLE
PACKING,PREFORMED
5-1142
7510-01-284-8576INTERCHANGEABLE
RIBBON,INKING
62321
5306-01-631-0485INTERCHANGEABLE
BOLT,MACHINE
1G51142

Frequently Asked Questions

What is NSN 5306-00-660-3299?

NSN 5306-00-660-3299 is a Bolt,machine, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5306 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5306-00-660-3299?

NSN 5306-00-660-3299 has 2 cross-referenced part numbers: FFB575TYPE2 (Federal Specifications Promulgated by General Services Administration Washington DC), 51-142 (Hardie-Tynes Co., Inc.).

What NSN replaces 5306-00-660-3299?

There are 10 known substitutes for 5306-00-660-3299: 5306-00-660-1822, 1680-00-535-4495, 5306-00-660-3317 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFB575TYPE2?

Key specifications for FFB575TYPE2: Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Thread Quantity Per Inch: 13; Head Height: 0.302 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN; Width Between Flats: 0.725 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5306-00-660-3299 still in active supply?

NSN 5306-00-660-3299 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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