Use: the HiLo thread and small milling head of drywall screw are ideal for fixing gypsum fibreboard on all types of standings as well as when connecting dry screed elements. An optimised small countersunk head with milling ribs ensures flush countersinking in the gypsum fibreboard. The special high-low thread ensures the absorption of high tensile forces and compressive forces. The black phosphating provides temporary corrosion protection and ensures good adhesion of filler. The chemical reaction with plaster and the possible appearance of rust stains is prevented. The H force attack provides optimal power transmission and secure grip during processing. The SPAX GIX-C plasterboard screws are and comply with the requirements of DIN EN 14566 "Mechanical fasteners for plasterboard systems". Box contents: 1 SPAX box, 1000 pieces drywall screws HiLo thread, small milling head, thread diameter (Ød1) = 3.9 mm x total length (Ls) = 30 mm, fully threaded length (LgV) = 24 mm, head diameter (Ødk): 6.8 mm, bit not included., Weight: 3.9462744898 Pounds, Manufacturer: Spax