https://www.coxhardware.com/c-623-hex-jam-nuts.aspx weekly 0.7 https://www.coxhardware.com/p-838-jam-nuts-plated-steel-sizes.aspxdaily0.9 https://www.coxhardware.com/p-2030-jam-nuts-stainless-steel.aspxdaily0.9