Nui nā ʻano ʻēheu hoʻowili ʻana iho, akā like nā ʻano like. ʻElima mau hiʻohiʻona nui. Hōʻike ʻia ka ʻenehana ma lalo nei i nā hiʻohiʻona ʻelima o nā ʻēheu hoʻoheheʻe ponoʻī.
1. Hana maʻamau i ke kila carburized (99% o ka nui o nā huahana). Hiki ke hoʻohana ʻia ma ke kila kila a i ʻole nā metala non-ferrous.
2. Pono e hoʻomaʻamaʻa ʻia nā ʻupena wili iho me nā ʻēheu. Hōʻike ʻo Hardware iā ʻoe, pono e hoʻopaʻa ʻia nā ʻūlū paʻa ponoʻī o ke kila kalapona, a ʻo nā wili paʻi paʻa kila kila me nā kui ʻēheu e hoʻopaʻa ʻia. I mea e hoʻokō ai i nā wili paʻi ponoʻī i nā ʻano mechanical a me ka hana i koi ʻia e ka maʻamau.
3. He kiʻekiʻe ka paʻakikī o ka ʻili a me ka paʻakikī kumu. ʻO ia hoʻi, "māmā ma loko a ikaika ma waho". Haʻi ʻia ka hāmeʻa iā ʻoe he hiʻohiʻona nui kēia o nā koi hana o nā kui ʻēheu ʻēheu ponoʻī. Inā haʻahaʻa ka paʻakikī o ka ʻili, ʻaʻole hiki ke wili ʻia i loko o ka matrix; inā ʻaʻohe ʻoʻoleʻa o ke kumu, e haki koke ia i ka wā e wili ʻia ai a ʻaʻole hiki ke hoʻohana ʻia. No laila, ʻo ka "ʻoluʻolu o loko a me ka paʻa o waho" he mau wili hoʻi me nā kui ʻēheu e hoʻokō i nā koi hana.
4. Pono ka ili o ka Best Self Drilling Screw With Wings i ka mālama ʻana i ka mālama ʻana i ka ʻili, maʻamau ka mālama electroplating. Hōʻike ka ʻenehana iā ʻoe e pono e mālama ʻia ka ʻili o kekahi mau huahana me ka phosphate (phosphating). Ka Laʻana: ʻO nā wili wili ponoʻī me nā kui ʻēheu ma luna o nā pā paia ka nui o ka phosphated