[Mike Cecil]

Dave,

For CMP Chevrolet parts manufactured and fitted in Australia, the thread was Whitworth ie BSW (bolt heads & nuts made to conform to UNC/UNF spanner sizes) . Where Canadian drawings called for fine threads, GMH manufactured UNF thread bolts and nuts.

For fitting CMP Ford parts manufactured in Australia (such as the attachment of the cab roof) the nuts and bolts were BSW with BSW bolt heads and nuts.

Never as simple as it seems!

Mike