The 90° cup washer is a machined steel part available for ASSY countersunk head screws ASSY Ecofast and ASSY VG CSK. The washer provides a proper bearing for the screw head in steel to wood connections without reaming out a steel plate.
Eliminating the need for reaming out steel plate holes to receive the screw head reduces steel plate thickness requirements thereby reducing steel plate cost. The 90° cup washers can be used with countersunk headed ASSY screws [ASSY VG CSK, ASSY Ecofast] for the following fasteners’ diameters:
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