A fastener, comprising: a shank having a point at a first end and a head at a second end, and having a base shank diameter, the shank including: a first region having a first helical thread having a first effective diameter, the first region of the shank having a first continuous shank diameter, the first helical thread having a first height relative to the first diameter, and a sub-region formed in the first region and having a second helical thread having a second effective diameter, the sub-region of the shank having a second continuous shank diameter smaller than the first shank diameter, the second helical thread having a second height relative to the second diameter the second helical thread interspersed with the first helical thread such that each thread has a pitch, the pitch of the first helical thread matching the pitch of the second helical thread; and a third region formed spaced apart from the first region and having a third helical thread having a third effective diameter, the third region of the shank having a third continuous shank diameter, the third helical thread having a third height relative to the third diameter, the third helical thread having a pitch smaller than the pitch of the first helical thread; and the head having a top portion and having a cutting structure, the cutting structure positioned to intersect the top portion and the shank. a shank having a point at a first end and a head at a second end, and having a base shank diameter, the shank including: a first region having a first helical thread having a first effective diameter, the first region of the shank having a first continuous shank diameter, the first helical thread having a first height relative to the first diameter, and a sub-region formed in the first region and having a second helical thread having a second effective diameter, the sub-region of the shank having a second continuous shank diameter smaller than the first shank diameter, the second helical thread having a second height relative to the second diameter the second helical thread interspersed with the first helical thread such that each thread has a pitch, the pitch of the first helical thread matching the pitch of the second helical thread; and a third region formed spaced apart from the first region and having a third helical thread having a third effective diameter, the third region of the shank having a third continuous shank diameter, the third helical thread having a third height relative to the third diameter, the third helical thread having a pitch smaller than the pitch of the first helical thread; and the head having a top portion and having a cutting structure, the cutting structure positioned to intersect the top portion and the shank. a first region having a first helical thread having a first effective diameter, the first region of the shank having a first continuous shank diameter, the first helical thread having a first height relative to the first diameter, and a sub-region formed in the first region and having a second helical thread having a second effective diameter, the sub-region of the shank having a second continuous shank diameter smaller than the first shank diameter, the second helical thread having a second height relative to the second diameter the second helical thread interspersed with the first helical thread such that each thread has a pitch, the pitch of the first helical thread matching the pitch of the second helical thread; and a third region formed spaced apart from the first region and having a third helical thread having a third effective diameter, the third region of the shank having a third continuous shank diameter, the third helical thread having a third height relative to the third diameter, the third helical thread having a pitch smaller than the pitch of the first helical thread; and the head having a top portion and having a cutting structure, the cutting structure positioned to intersect the top portion and the shank.