The LD-395 carbon steel lock washer series provides spring and tooth-type locking washers engineered to resist fastener loosening under vibration and dynamic load. Covering inner diameters from M3 to M20, the series includes split spring washers to DIN 127, external tooth lock washers to DIN 6798A, and internal tooth lock washers to DIN 6798J. This variety allows buyers to select the locking mechanism best suited to each joint, from general machinery to precision electrical assemblies where a clean appearance under the fastener head is required.

The locking mechanisms differ by type but share a common purpose of preventing rotation. A split spring washer is a single coil ring with a helical gap; when compressed between the fastener head or nut and the mating surface, it exerts continuous axial spring force and a slight biting edge that resists loosening. Tooth lock washers use a ring of teeth, either on the outer or inner edge, that compress and bite into both the fastener bearing surface and the joint surface, creating multiple contact points that grip firmly against rotation. External tooth washers provide a larger biting area for general applications, while internal tooth washers keep teeth under smaller heads and offer a cleaner external profile for visible or precision assemblies.

Material and finish are central to the performance of lock washers. The series is manufactured from spring steel (65Mn) or carbon steel, heat-treated to deliver consistent elasticity and repeated spring-back after compression. This elasticity is what allows the washer to maintain tension on the joint even as the assembly settles or experiences vibration. Zinc plating in white/blue or yellow finishes provides corrosion resistance for indoor and covered outdoor service, and a stainless steel option is available for food, marine, and outdoor environments. Dimensional accuracy, including inner diameter, outer diameter, and tooth geometry, is controlled to DIN 127 and DIN 6798 standards so that each washer seats correctly and locks reliably with standard metric fasteners.

For wholesale buyers and OEM accounts, the LD-395 series supports flexible customization and packaging. OEM sizes and types, custom plating, stainless steel variants, a wave washer option for applications requiring uniform axial load, private-label branding, and custom retail packaging can all be supplied. With a minimum order quantity of 5000 pieces, mixed orders across sizes and types supported, and a production lead time of 5 to 12 days, the series offers importers, assemblers, and distributors a dependable, standards-compliant source of carbon steel spring and tooth lock washers at competitive wholesale pricing.