Timco - Metal Timber to Heavy Section Screws Wing-Tip Zinc (Size 5.5x85-100 Pcs)
Specifically designed to attach wood to heavy section steel (Max. R.P.M. without burning out. To Suit Timber mm - 30 - 49. Finish - Zinc. Thread Dia. Effective Thread Length mm - 51. Material - Case & Core Hardened Carbon Steel. ).