How can I stop a toilet seat from rapidly loosening?

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The seat on my toilet always works itself loose. It has plastic thumb-screw-style nuts that tighten on to bolts on the underside of the toilet. The left nut works itself loose over the course of a few days of normal use. I can tighten it again but a few days later, the seat is back to wiggling around from the loose connection.



How do I get this arrangement to stay tight?










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    The seat on my toilet always works itself loose. It has plastic thumb-screw-style nuts that tighten on to bolts on the underside of the toilet. The left nut works itself loose over the course of a few days of normal use. I can tighten it again but a few days later, the seat is back to wiggling around from the loose connection.



    How do I get this arrangement to stay tight?










    share|improve this question























      up vote
      2
      down vote

      favorite









      up vote
      2
      down vote

      favorite











      The seat on my toilet always works itself loose. It has plastic thumb-screw-style nuts that tighten on to bolts on the underside of the toilet. The left nut works itself loose over the course of a few days of normal use. I can tighten it again but a few days later, the seat is back to wiggling around from the loose connection.



      How do I get this arrangement to stay tight?










      share|improve this question













      The seat on my toilet always works itself loose. It has plastic thumb-screw-style nuts that tighten on to bolts on the underside of the toilet. The left nut works itself loose over the course of a few days of normal use. I can tighten it again but a few days later, the seat is back to wiggling around from the loose connection.



      How do I get this arrangement to stay tight?







      toilet maintenance bathroom-fixtures hardware






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      asked 1 hour ago









      Jean-Paul Calderone

      31918




      31918




















          2 Answers
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          Nylon is self-lubricating. Even when tight it's very slippery against itself. You'll need to increase friction.



          It may seem counter-intuitive, but you could apply some PTFE (Teflon) plumbing tape to the bolt threads. Even though PTFE is used as a lubricant, it'll thicken the thread diameter and create resistance to movement. Wrap 3-5 layers on the threads where the nut will rest, in the direction the nut tightens (clockwise from the end of the bolt).



          You could also replace the nuts with brass or aluminum. They'll grab the bolt more aggressively. Be sure to use soft washers against the porcelain surface to prevent damage.



          One other thing that can help is to reduce slide movement of the seat on the bowl. Install rubber washers under the seat bolts to create some grip.






          share|improve this answer





























            up vote
            1
            down vote













            It is likely that the plastic nut (or bolt it screws to) is stripped. It may feel like it is tightening, but works loose because the threads are damaged. You should grab a set of replacement toilet seat bolts at the plumbing shop, they are (fairly) universal and come in a set of two. You do need to tighten rather firmly, but it is easy to damage plastic threads by overtightening.






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              2 Answers
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              active

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              2 Answers
              2






              active

              oldest

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              active

              oldest

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              up vote
              3
              down vote













              Nylon is self-lubricating. Even when tight it's very slippery against itself. You'll need to increase friction.



              It may seem counter-intuitive, but you could apply some PTFE (Teflon) plumbing tape to the bolt threads. Even though PTFE is used as a lubricant, it'll thicken the thread diameter and create resistance to movement. Wrap 3-5 layers on the threads where the nut will rest, in the direction the nut tightens (clockwise from the end of the bolt).



              You could also replace the nuts with brass or aluminum. They'll grab the bolt more aggressively. Be sure to use soft washers against the porcelain surface to prevent damage.



              One other thing that can help is to reduce slide movement of the seat on the bowl. Install rubber washers under the seat bolts to create some grip.






              share|improve this answer


























                up vote
                3
                down vote













                Nylon is self-lubricating. Even when tight it's very slippery against itself. You'll need to increase friction.



                It may seem counter-intuitive, but you could apply some PTFE (Teflon) plumbing tape to the bolt threads. Even though PTFE is used as a lubricant, it'll thicken the thread diameter and create resistance to movement. Wrap 3-5 layers on the threads where the nut will rest, in the direction the nut tightens (clockwise from the end of the bolt).



                You could also replace the nuts with brass or aluminum. They'll grab the bolt more aggressively. Be sure to use soft washers against the porcelain surface to prevent damage.



                One other thing that can help is to reduce slide movement of the seat on the bowl. Install rubber washers under the seat bolts to create some grip.






                share|improve this answer
























                  up vote
                  3
                  down vote










                  up vote
                  3
                  down vote









                  Nylon is self-lubricating. Even when tight it's very slippery against itself. You'll need to increase friction.



                  It may seem counter-intuitive, but you could apply some PTFE (Teflon) plumbing tape to the bolt threads. Even though PTFE is used as a lubricant, it'll thicken the thread diameter and create resistance to movement. Wrap 3-5 layers on the threads where the nut will rest, in the direction the nut tightens (clockwise from the end of the bolt).



                  You could also replace the nuts with brass or aluminum. They'll grab the bolt more aggressively. Be sure to use soft washers against the porcelain surface to prevent damage.



                  One other thing that can help is to reduce slide movement of the seat on the bowl. Install rubber washers under the seat bolts to create some grip.






                  share|improve this answer














                  Nylon is self-lubricating. Even when tight it's very slippery against itself. You'll need to increase friction.



                  It may seem counter-intuitive, but you could apply some PTFE (Teflon) plumbing tape to the bolt threads. Even though PTFE is used as a lubricant, it'll thicken the thread diameter and create resistance to movement. Wrap 3-5 layers on the threads where the nut will rest, in the direction the nut tightens (clockwise from the end of the bolt).



                  You could also replace the nuts with brass or aluminum. They'll grab the bolt more aggressively. Be sure to use soft washers against the porcelain surface to prevent damage.



                  One other thing that can help is to reduce slide movement of the seat on the bowl. Install rubber washers under the seat bolts to create some grip.







                  share|improve this answer














                  share|improve this answer



                  share|improve this answer








                  edited 20 mins ago

























                  answered 1 hour ago









                  isherwood

                  42.4k453105




                  42.4k453105






















                      up vote
                      1
                      down vote













                      It is likely that the plastic nut (or bolt it screws to) is stripped. It may feel like it is tightening, but works loose because the threads are damaged. You should grab a set of replacement toilet seat bolts at the plumbing shop, they are (fairly) universal and come in a set of two. You do need to tighten rather firmly, but it is easy to damage plastic threads by overtightening.






                      share|improve this answer
























                        up vote
                        1
                        down vote













                        It is likely that the plastic nut (or bolt it screws to) is stripped. It may feel like it is tightening, but works loose because the threads are damaged. You should grab a set of replacement toilet seat bolts at the plumbing shop, they are (fairly) universal and come in a set of two. You do need to tighten rather firmly, but it is easy to damage plastic threads by overtightening.






                        share|improve this answer






















                          up vote
                          1
                          down vote










                          up vote
                          1
                          down vote









                          It is likely that the plastic nut (or bolt it screws to) is stripped. It may feel like it is tightening, but works loose because the threads are damaged. You should grab a set of replacement toilet seat bolts at the plumbing shop, they are (fairly) universal and come in a set of two. You do need to tighten rather firmly, but it is easy to damage plastic threads by overtightening.






                          share|improve this answer












                          It is likely that the plastic nut (or bolt it screws to) is stripped. It may feel like it is tightening, but works loose because the threads are damaged. You should grab a set of replacement toilet seat bolts at the plumbing shop, they are (fairly) universal and come in a set of two. You do need to tighten rather firmly, but it is easy to damage plastic threads by overtightening.







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered 1 hour ago









                          Jimmy Fix-it

                          20.1k1029




                          20.1k1029



























                               

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