1.Manaʻo
ʻO ka pahu hexagonal waho he mea hoʻohui metala, ʻike ʻia hoʻi he wili hexagonal waho, he wili hexagonal waho a i ʻole he pahu hexagonal waho.

2.Surface lapaʻau
I ka hana ʻana i nā bolts, ʻo ka mālama ʻana i ka ʻili kekahi o nā loulou pono ʻole. Hiki iā ia ke hana i ka ʻili o ka bolt e hoʻokō i kekahi mau koi a hoʻomaikaʻi i kona kūpaʻa corrosion, ikaika a me nā aesthetics.
Nui nā ʻano hana lapaʻau ʻili no nā bolts, ʻo nā mea maʻamau penei:
Galvanizing: Hoʻokomo ʻia nā bolts i loko o kahi solution zinc, a ua uhi ʻia ka zinc ma ka ʻili o ka papa bolts ma ka papa ma o ka hopena electrochemical, e hoʻolilo iā lākou i ka pala a me ka corrosion-resistant.
Hot-dip galvanizing: Ma hope o ka hana ʻia ʻana o nā bolts, ua hoʻoheheʻe ʻia lākou i loko o ka wai zinc molten, a ua hoʻokumu ʻia kahi papa zinc ma ka ʻili ma o ka hopena kemika e loaʻa ai ka anti-rust, corrosion-resistant a me nā hopena ʻē aʻe.
Hoʻomaʻamaʻa ʻeleʻele: Hoʻokumu ʻia kahi kiʻiʻoniʻoni metala ʻeleʻele ma ka ʻili o ka bolt ma o ka hopena kemika e hoʻomaikaʻi ai i kona kūpaʻa ʻana.
Lapaʻau Phosphating: Hoʻomoʻa i ka bolt i ka solution phosphating e hana i kahi kiʻiʻoniʻoni phosphating ma ka ʻili e hoʻomaikaʻi ai i kona kūpaʻa ʻana.
Hoʻomaʻamaʻa paʻakikī: Ma o ka hoʻomaʻamaʻa ʻana i ka wela a i ʻole ka hoʻoulu ʻana i ka ʻili, ua hana ʻia kahi papa o ka uhi me ka paʻakikī kiʻekiʻe ma luna o ka ʻili o ka bolt e hoʻomaikaʻi ai i kona ikaika a ʻaʻahu i ke kūpaʻa.
ʻO nā ʻano hana lapaʻau maʻamau i luna o ka bolt surface. Kūlike nā ʻano hana lapaʻau like ʻole i nā hiʻohiʻona noiʻi like ʻole a me nā koi. I ka hana ʻana i ka mālama ʻana i ka bolt surface, pono e hoʻokō ʻia e like me nā kūlana kūpono a me nā kikoʻī e hōʻoia i ka hoʻokō ʻana o nā bolts i mālama ʻia i nā koi kūpono.

3. Hana pae
ʻO ka lepili papa hana o ka bolt hexagonal waho he ʻelua ʻāpana o nā helu, e hōʻike ana i ka waiwai o ka ikaika tensile nominal a me ka ratio ikaika o ka mea bolt.
No ka laʻana, ʻo ka bolt me ​​ka pae hana 4.6 ʻo ia hoʻi:
a. ʻO ka ikaika tensile nominal o ka mea bolt hiki i 400MPa;
b. ʻO ka lākiō hua-ikaika o ka mea bolt he 0.6;
c. ʻO ka ikaika hāʻawi inoa o ka mea bolt hiki i 400 × 0.6 = 240MPa pae
ʻO ka pae hana 10.9 mau bolts ikaika kiʻekiʻe, ma hope o ka mālama wela, hiki ke hoʻokō:
a. ʻO ka ikaika tensile nominal o ka mea bolt hiki i 1000MPa;
b. ʻO ka ikaika hāʻawi inoa o ka mea bolt hiki i 1000 × 0.9 = 900MPa.

4. ʻO ka ʻokoʻa ma waena o nā bolts hexagonal waho maʻamau a me nā bolts hexagonal waho ikaika kiʻekiʻe.
Hiki ke hoʻohana hou ʻia nā bolts hexagonal maʻamau, akā ʻaʻole hiki ke hoʻohana hou ʻia nā bolts kiʻekiʻe.
ʻO nā pōkā ikaika kiʻekiʻe ka mea maʻamau i hana ʻia me ke kila ikaika nui No. 45 kila (8.8s), 20MmTiB (10.9S), a he mau bolts prestressed. No nā ʻano kuʻi, e hoʻohana i ka torque wrench e hoʻopili i ka prestress i ʻōlelo ʻia, a no nā ʻano hoʻoluhi kaomi, wehe i ke poʻo torx. Hana ʻia nā kī maʻamau i ke kila maʻamau (Q235) a pono e hoʻopaʻa ʻia.
ʻO nā kī maʻamau ka papa 4.4, ka papa 4.8, ka papa 5.6 a me ka papa 8.8. ʻO nā bolts ikaika kiʻekiʻe ka papa 8.8 a me ka papa 10.9, me ka papa 10.9 ka mea maʻamau.
ʻAʻole ʻoi aku ka nui o nā puka wili o nā bolts maʻamau ma mua o nā bolts ikaika kiʻekiʻe. ʻOiaʻiʻo, liʻiliʻi nā puka bolt maʻamau.