1.1 This specification covers an acceptable countersinkinstrument intended to countersink a drilled pilot hole in bone toreceive the tapered head of a medical bone screw. The specificdesign covered by this specification incorporates a pilot tip ofsuitable diameter to engage the pilot hole and a countersinkcontour for medical bone screws conforming to SpecificationF543.
1.2 The values stated in inch-pound units are to be regarded asthe standard.