Package contents - 10 pieces M16 x 26 mm (inner diameter x outer diameter) stainless steel toothed washers, inner serrated. Key benefits - Prevents fastener loosening: inward-facing serrations bite into the nut or bolt head and the substrate, increasing friction and rotation resistance for a more secure connection. - Corrosion resistant and long lasting: made from rust‑proof 304 stainless steel (A2 DIN 6797), suitable for use in damp environments and both indoor and outdoor applications. - Reliable for soft to medium metals: designed to hold well on softer materials while providing strong clamping force when used with standard nuts and bolts. Product features - Size: M16 x 26 mm (ID x OD) — for M16 fasteners. - Construction: flat washer with inner serrated (toothed) profile to lock against turning. - Material standard: 304 stainless steel, A2 DIN 6797 — corrosion resistant and durable. - Pack quantity: 10 pieces. Performance and compatibility - Combines the anti‑loosening action of the serrated washer with the locking force of the nut to create greater friction and improved resistance to vibration and rotation. - Ideal for use on soft to medium metals where inward teeth can engage without damaging the mating fastener. - Suitable for common fastener assemblies where a compact, low‑profile locking washer is required. Practical applications (example use scenarios) - Automotive: secure wheel accessories, trim, brackets or adaptations on car rims where vibration resistance is important. - Workshop and DIY: replacement toothed washers for general repairs, furniture assembly, metalwork and home projects that require vibration‑resistant fastening. - Light machinery and equipment: locking connections on panels, guards, or mounting brackets made from sheet metal or softer alloys. Installation tips - Fit over an M16 bolt or stud so the inner serrations engage the nut or the mating surface. - Tighten the nut to standard torque for the bolt grade being used; the washer increases friction, so final torque may feel higher. - Inspect periodically in high‑vibration environments to ensure continued engagement. Quality note - Manufactured to the A2 DIN 6797 stainless steel specification (304), providing corrosion resistance appropriate for typical indoor and outdoor uses without special coatings.