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It should be sturdy enough to resist vibration cracking of the  most out of balance vibrating norton twin.
Drilled to allows mounting of a standard norton commando oil filter housing.

The nuts are welded in place for ease of mounting. Two stainless bolts are included.

As welded,  1/4" thick,  mill finish 304 stainless.
Bracket only (no filter housing) $30 + s&h
net 358 gms