A pilot hole is a small hole created in a surface to act as a guide for drilling, screwing, or nailing. There are a number of reasons to create a pilot hole, and several different techniques can be used. One of the most common involves the use of a drill with a small bit to make the hole, although people can also create a pilot hole by driving in a small nail partway, and then removing the nail, leaving a neat hole behind.

http://www.wisegeek.com/what-is-a-pilot-hole.htm
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Vijci za drvo zahtevaju prethodno bušenje rupa odgovarajuće veličine. Prečnik vodeće rupe za telo vijka podrobno je definisan za različite tipove drveta i varira sa njihovom gustinom. Međutim, prečnik vodeće rupe vijka u ploči iverici i njen uticaj na otpornost na izvlačenje nije bio dosad odgovarajuće ispitivan.

http://scindeks.nb.rs/article.aspx?artid=1451-401X0405015M
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Tehnički rečnik, J. Marković

pilot - vodeći