Coating of screws

Details Coating of screws Coating of screws

F - Mech Eng,Light,Heat,Weapons

16

B

117/240, 85/3

F16B 33/06 (2006.01) B05D 7/00 (2006.01)

Patent

CA 2027689

ABSTRACT OF THE DISCLOSURE COATING OF SCREWS A method of making a screw threaded fastener (1,10) for fixing cladding to a building includes the steps of applying a mastic covering (5,15) to a screw threaded portion (4,13) of the fastener, and applying a non-sticky protective coating (6,16) to the outside of the mastic (5,15) to prevent the fasteners (1,10) sticking together during handling and packaging. Preferably the protective coating (6,16) is a coating of a waxy substance and is applied to the outside of the mastic (5,15) by dipping or spraying. The fasteners are then easy to use and form a water-tight moisture vapour-proof seal with their fixings. The waxy coating (16) may be applied on its own to the drill point (12) to act as a lubricant during driving of the fastener.

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