Timco Metal Construction Timber to Light Section Screws - Countersunk - Wing-Tip - Self-Drilling - Exterior - Silver Organic 4.8 x 38 - 200 Pieces Wastes and Traps Timco Form B Washers -

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Timco Metal Construction Timber to Light Section Screws - Countersunk - Wing-Tip - Self-Drilling - Exterior - Silver Organic 4.8 x 38 - 200 Pieces Wastes and Traps Timco Form B Washers -Description Timco Metal Construction Timber to Light Section Screws Countersunk Wing Tip Self Drilling Exterior Silver Organic 4. 8 x 38 200 Pieces product description: Specifically designed to attach wood to metal (Max. 4mm). Coarse self tapping thread with wings designed to ream out the timber, so the screw can achieve Max. R. P. M. without burning out. When the wings hit the metal they will break off to permit the thread to self tap into the metal.