The structure of the composite layer and interface including the embedded delamination defect around the countersunk
hole is illustrated in Figure 4.
* (6) 3/8-by-1-inch countersunk
machine bolts, nuts, lock washers, fender washers (angle base to bed)
Oval is used in a countersunk
hole so that only a slight extension appears above the work surface.
The low profile version is specifically designed for thin sheet, and according to Torque Control Limited, is particularly useful where the normal countersunk
inserts cannot be used, although a high protrusion is not acceptable.
Attach with two 2 1/2-inch countersunk
screws near the bottom and one 1 1/4-inch deck screw through the angled top.
A smooth bore with a countersunk
tapped hole accepts a screw that exits through a flat surface and can be used for creating shelves, displays or attaching signs and other components.
Drill 100mm countersunk
screws through the runners inside the playhouse.
Collars features two-piece construction with flats on two outside surfaces which are drilled and tapped for attachment to each other, along with a countersunk
hole for mounting to any surface.
A handsome detail at each corner of the planters--butted joints with countersunk
copper-pipe end caps that mask long deck screws--hints that the project is easy to build.
Try reader David Bolt's effective "emergency" technique for drilling countersunk
holes for screwheads in softwoods like pine, cedar and redwood.
Tubes are clamped top and bottom to the node ends by plates designed to be held by a single countersunk
screws, first drilling the clearance hole, then using a countersunk
bit to bore out space for the screw head.