For sale : MONSTER wood pins for use with the gray and brown glaze M-3490 as well as later styles with very large pin holes used in Utah and Idaho by Utah power and Idaho Power. The taller pins date from 1908-1917 the shorter ones were used later and as replacements both pins have a tapered thread that tapers from 1.5" to 2"

The small pin is a standard bell system telephone pin for comparison

The tall pins are 23" long the short pins are 19" long. Both will fit and were used with the M-3490.

I have a small number of both sizes of pin. They are all in good shape with good threads and no rot.

$30 each + shipping