| 摘要 |
An improvement in the structure of a capped lock nut includes a nut body made of metal and formed with a shoulder extending upwardly from a top of the nut body and then inwardly to form a flange thereby providing an annular recess between the flange and an upper thread of internal threads of the nut body; a nylon packing ring snugly-fitted within the nut body; and a cap being a hemispherical shell member having an outer diameter which is just equal to an outer diameter of the shoulder of the nut body, whereby the cap can be easily welded to the nut body without causing damage to the nylon packing ring thus strengthening the engagement therebetween and increasing the production rate.
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