Product Overview Replacement Blade for Scotch 3M S-634 This Memotronics brand replacement fits the S-634 Filament Tape Box Sealer / L-Clip Applicator. It replaces Scotch/3M Part# 70-8601-0078-6. Made from HSS (High Speed Steel), this blade is a superior product with a life expectancy at least twice that of the OEM part. To install the blade: Loosen the acorn nut on the blade hinge assembly Pull the old blade towards the front and remove / discard Insert the new blade under the acorn nut and push against the blade stop. The teeth’s bevel should face upwards. Tigthen the acorn nut Ensure that the blade swing arm is in the lowered position (blade is horizontal) Reviews (No reviews yet) Write a Review