These stainless steel M6 hex-head screws are useful to expand the versatility of your TMS system. They fit perfectly to all M6 fittings (threaded or non-threaded countersunk holes) on the Altair TMS Telescope Mounting hardware system They will also fit Altair Wave Series, Lightwave and Starwave Telescope Tube Rings. The low cap heads do not protrude from the countersunk holes in Altair Losmandy format and Vixen format plates and bars, and can also be used to attach Altair GSR series guide scope rings to dovetail bars and plates. Sold in packs of 6x screws. Made from Stainless Steel for corrosion protection.