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Quantity
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Thread forming screws form their own thread straight into a printed plastic hole, with no insert or tapping needed. This kit covers all four sizes in both countersunk and pan washer heads, ten of each.
40 countersunk: 10 each of 3 x 8, 3 x 15, 4 x 10 and 4 x 15 mm
40 pan washer head: 10 each of 3 x 8, 3 x 15, 4 x 10 and 4 x 15 mm