just to add to Jacques's post. Matching dis-similar metals is best. With a hard surfaced pin (eg. a chromed and ground surface) a softer steel bush is best.
You don't want too much side clearance.
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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