Timco - Metal Construction Timber to Light Section Screws - Countersunk - Wing-Tip - Self-Drilling - Bi-Metal - Exterior - Silver Organic 5.5 x 85mm - (100 PCS Box) Length mm:85 "mpn": "AHCHMB"

"mpn": "AHCHMB"

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Timco - Metal Construction Timber to Light Section Screws - Countersunk - Wing-Tip - Self-Drilling - Bi-Metal - Exterior - Silver Organic 5.5 x 85mm - (100 PCS Box) Length mm:85 "mpn": "AHCHMB"Timco Metal Construction Timber to Light Section Screws Countersunk Wing Tip Self Drilling Bi Metal Exterior Silver Organic 5. 5 x 85mm (100 PCS Box) Specifically designed to attach wood to light section steel (Max. 5mm). 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.