On Sat, 25 Feb 2012 20:06:20 +0000, Baron
wrote:

Inscribed thus:

I can find no evidence that M8 with 1.5 mm pitch exists - all the
references I have seen mention only 1mm and 1.25 mm pitch in this
size. What are the odds that a set screw of this nature would be of
so uncommon configuration?

A result of a search for M8x1.5 on Google (one of many returns,
BTW).

http://www.globalindustrial.com/p/tools/industrial-tools/Dies1-Round/m8x1-5-hss-tmx-round-adjustable-die-metric-left-hand-1-inch-od?utm_source=google_pr;utm_medium=cpc;utm_campaig n=Dies-Round-google_pr;infoParam.campaignId=T9F

The die in that photo shows M12x1 RH a standard size.

Looking through Fastenal and McMaster Carr web sites I found a single
cap screw M8 x 1.5 mm (Fastenal - $5) and one other fastener M8 x 2.5
(sic).

Neither company carried any set screws other then M8 x 1 or M8 x 1.25.

Neither company carries taps M8 x 1.5.

Michael Koblic,
Campbell River, BC