Socket set screws with flat point DIN 913 M3x20mm Material: stainless steel A2 or A4 With pre-applied encapsulated thread locking adhesive from one side. Reactive thread locking processes apply dry to the touch chemical adhesives to internally or externally threaded fasteners. During installation the encapsulated components mix, causing a chemical reaction which locks together and seals the mating parts, an expansion also occurs, filling the gaps between fastener threads. 3000 pcs. Only for EU suppliers