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matching black hexagon bolts
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Moorabbin Air MuseumBooklet - CAC Aircraft assembly, Unified Black Hexagon Bolts, Screws , Nuts ( UNC & UNF Threads ) Heavy Series
... Unified Black Hexagon Bolts, Screws , Nuts ( UNC & UNF...Black hexagon bolts...CAC Aircraft assembly Black hexagon bolts Overview ...Overview of standards for unified screw threads, circa 1950snon-fictionOverview of standards for unified screw threads, circa 1950sblack hexagon bolts -
Bendigo Military MuseumEquipment - GENERATOR/TACOMETER UNITS, C.WW2
Item belonged to Maxwell Lennox Matheson No 418447 RAAF. Refer Cat No 1959 for his service records..1) Unt is black metal, cylinder shape with hexagonal section fitted with 6 bolts cylinder section also has a shaft on the rear that turns. .2) Unit is metal with dial numbering from 0 to 45 rpm Rear has electrical connections.1) “Generator Tachometer Ser no 7169” .2) “Indicator Tachometer E73”electrical technology, instruments, raaf
