When a long taper aligns holes (usually 2) it is a drift pin/ punch, usually termed by mechanics. Iron workers use the idea, but call it a spud. Their heavier version is a bull pin; headed for striking with a hammer. The tool is shifted around so a fastener can be inserted in adjacent position. After one hole receives fastener, the remainder are closer yet to alignment.

When a near full size pin awaits fasteners, it is a slave pin/ punch. This is a particularity on pivoting members. A drift doesn't achieve very good axial alignment, compared to a cylinder.