The utility model discloses a fixed stock rubs, including the stock body, the external surface of stock sets up to the full thread, the stock body still including the fixed cover of friction, seal thick liquid ring, backing plate and nut, the fixed cover of friction sets up as along the fixed cover length direction of friction and is provided with the open -ended body, the fixed cover of frictionis including integrated into one piece's front end toper reducing section and rear end straight tube section, toper reducing section is provided with fastening mouthful, the stock body sets up in thefriction fixedly in tao, it sets up between the stock body and the fixed cover of friction to seal the thick liquid ring, the external surface of stock is located to the backing plate cover, and the backing plate passes through nut fixed joint with the stock body, and the backing plate setting is between nut and rear end straight tube section tip, the utility model discloses a slip casting that the fixed hollow anchor structure that rubs is ripe, reliable, easy operation, leakproofness are good, be suitable for various thick liquids.