Model Number: HYDS1039 Brand Name: HUAYI Key Specifications/Special Features: DIN6796 disc spring washers (HDS series) are lock washers designed for the connection of boltsProduced based on standard DIN 6796 and used to connect medium or high-strength boltsHDS series are very useful for large bearing load and good elasticity resumptionThe tension of bolt is able to endure the relaxation due to following: abrasion, deformation, relaxation, expansion due to heat, or shrinkage of wearing parts, or pressing of sealing partsHDS series greatly increase the elasticity of bolts, can effectively substitute for conventional spring washers, but not suitable for combinations of locking washers or flat washers

HDS series of disc springs are applicable in an opposition or superposition combination

Opposition combination is able to increase the deformation of the pair of disc springs, while the superposition combination is able to increase the tension of the pair of disc springs

It's better that they are pressed to flatness in assembly because this status will increase the tension moment, and then an appropriate bolt tension may be obtained without a torque wrench