M8 Serrated Lock Washers (Pack of 25) Zinc Plated Alloy Steel Washers External Toothed Gasket Serrated Lock Washer DIN 6798 (8.4mm 15mm)

• EXCELLENT FIXATION: Serrated lock washers increase the friction between the bolt head/nut and the mating surface. They do this by gripping into the mating surfaces.
• ALLOY STEEL: These Serrated lock washers for screws are alloy Steel which is one of the good forms of corrosion-resistant steel, making it last longer than other hardware on the market today.
• TOOTHED WASHER: The main purpose of the toothed washer is to counteract forces to unscrew a threaded connection.
• WASHERS THAT YOU CAN DEPEND ON: Our hardware is very strong and is great for both indoor and outdoor use. The alloy steel with zinc plated is superior to regular steel and has great anti-corrosion properties.
• DIMENSIONS: Inside diameter, outside diameter, and thickness please refer to pictures. Material: Alloy Steel Zinc Plated. Externally toothed lock washer according to standard technical specifications: DIN 6798, CSN 021745, UNI 8842. Size M8. Pack of 25.

DESCRIPTION: Serrated lock washers provide excellent resistance to loosening. Please note that these washers come in two different types - internal toothed and external toothed. And when it comes to loosening resistance, the externally toothed washer does a better job than an internally toothed washer. But the internally toothed washer comes with greater locking abilities. The internally toothed washer, as the name suggests, has small projections on its inner side while the outer toothed washer has small projections on its outer diameter. In both cases, the teeth bite into the joint material and create a holding pressure that doesn't loosen even during continuous vibrations. Note: Single-part serrated washers can damage painted/coated surfaces because they have a tendency to rotate with the fastener. This risks damaging the surface, cracking the paint/coating, and causing corrosion. Size: M8 Pack of 25.