Nondrilled

Nondrilled is an adjective used to describe parts, components, or tools that have not had holes, openings, or threaded features formed by drilling or tapping. The term contrasts with drilled, tapped, or perforated variants and is commonly used in manufacturing, construction, and procurement to indicate a standard or unfinished state intended for later modification.

In manufacturing and engineering, nondrilled castings, blanks, housings, or plates are produced to standard outside dimensions without holes. Customers may specify hole patterns, sizes, and locations during subsequent fabrication. This approach can shorten lead times for common shapes and preserve flexibility when exact hole layouts are not yet determined at the time of purchase.

In construction and mechanical assembly, nondrilled anchors, flanges, or plates are supplied without holes so that field drilling can be performed to match precise layouts. Drilling or tapping in the field allows for tailored fit and alignment, reducing the risk of misplacement that might arise from predrilled but inaccurately located holes.

In quality and logistics, nondrilled parts require careful handling to maintain tolerances, surface finish, and flatness, since additional machining may affect warranties and specifications. Documentation typically specifies recommended drilling procedures, tolerances, and post-processing checks to ensure compatibility with subsequent components.

See also: drilled, predrilled, tapping, perforation.