1. Echiche
Mkpọchi hexagonal dị n'èzí bụ ihe mgbakwunye ígwè, nke a makwaara dị ka skru hexagonal dị n'èzí, skru hexagonal dị n'èzí ma ọ bụ skru hexagonal dị n'èzí.

Ọgwụgwọ elu 2.
N'ime usoro mmepụta nke bolts, ọgwụgwọ elu bụ otu n'ime njikọ dị mkpa. Ọ nwere ike ime ka elu nke bolts ahụ mezuo ihe ụfọdụ achọrọ ma melite iguzogide nchara, ike na ịma mma ya.
E nwere ọtụtụ ụdị usoro ọgwụgwọ elu maka bolts, ndị a na-ahụkarị bụ ndị a:
Nhagharị: A na-emikpu bolts ndị ahụ n'ime mmiri zinc, a na-ekpuchikwa zinc ahụ n'elu oyi akwa bolts site na mmeghachi omume electrochemical, na-eme ka ha ghara ịcha nchara ma ghara ịcha nchara.
Mkpọchi ọkụ: Mgbe emechara bolts ndị ahụ, a na-emikpu ha n'ime mmiri zinc gbazere agbaze, a na-emekwa ka oyi akwa zinc dị n'elu ya site na mmeghachi omume kemịkalụ iji nweta mmetụta mgbochi nchara, mgbochi nchara na mmetụta ndị ọzọ.
Ọgwụgwọ ime ka ihe nwuo oji: A na-emepụta ihe nkiri oxide ojii n'elu ihe mkpuchi ahụ site na mmeghachi omume kemịkalụ iji melite iguzogide nchara ya.
Ọgwụgwọ Phosphating: Mikpuo bolt ahụ n'ime mmiri phosphating iji mepụta ihe nkiri phosphating n'elu iji mee ka ọ ghara ire ere nke ọma.
Ọgwụgwọ siri ike: Site na ọgwụgwọ okpomọkụ ma ọ bụ ịgbasa elu, a na-emepụta oyi akwa mkpuchi nwere ike siri ike karịa n'elu bolt ahụ iji melite ike ya na iguzogide iyi.
Ihe ndị a dị n'elu bụ ụzọ a na-esi agwọ bolt surface. Ụzọ ọgwụgwọ dị iche iche kwekọrọ na ọnọdụ na ihe achọrọ maka ojiji dị iche iche. Mgbe a na-eme bolt surface treatment, a ga-eme ya dịka ụkpụrụ na nkọwapụta kwekọrọ si dị iji hụ na bolt ndị a gwọrọ ruru ihe achọrọ maka arụmọrụ dị mkpa.

3. Arụmọrụ ọkwa
Akara ọkwa arụmọrụ nke bolt hexagonal mpụta nwere akụkụ abụọ nke ọnụọgụgụ, nke na-anọchite anya uru ike nrụgide aha na oke ike mmepụta nke ihe bolt.
Dịka ọmụmaatụ, bolt nwere ọkwa arụmọrụ 4.6 pụtara:
a. Ike nrụgide aha nke ihe bolt ahụ ruru 400MPa;
b. Oke ike mmepụta nke ihe bolt bụ 0.6;
c. Ike mmepụta aha nke ihe bolt ahụ ruru ọkwa 400 × 0.6 = 240MPa
Ọkwa arụmọrụ nke 10.9 bolt siri ike, mgbe ọgwụgwọ okpomọkụ gasịrị, nwere ike imezu:
a. Ike nrụgide aha nke ihe bolt ahụ ruru 1000MPa;
b. Ike mmepụta aha nke ihe bolt ahụ ruru 1000 × 0.9 = 900MPa.

4. Ihe dị iche n'etiti boltị hexagon nkịtị dị n'èzí na boltị hexagon dị elu dị n'èzí
Enwere ike iji bolt nkịtị nke nwere hexagonal mee ihe ọzọ, mana enweghị ike iji bolt ndị nwere ike dị elu mee ihe ọzọ.
A na-ejikarị ígwè dị elu nke nwere ike nke 45 (8.8s), 20MmTiB (10.9S) eme bolts ndị nwere ike dị elu, ha bụkwa bolts ndị a na-etinye nrụgide. Maka ụdị esemokwu, jiri snaja torque tinye pressrestress akọwapụtara, ma maka ụdị ndị nwere nrụgide, tọpụ isi torx ahụ. A na-ejikarị ígwè nkịtị (Q235) eme bolts nkịtị, naanị ihe a ga-eme bụ ka e sie ya ike.
Bọltị nkịtị na-abụkarị ọkwa 4.4, ọkwa 4.8, ọkwa 5.6 na ọkwa 8.8. Bọltị ndị nwere ike dị elu na-abụkarị ọkwa 8.8 na ọkwa 10.9, ebe ọkwa 10.9 bụ nke a na-ahụkarị.
Oghere skru nke boltị nkịtị abụghị ihe buru ibu karịa nke boltị siri ike. N'eziokwu, oghere boltị nkịtị dị obere.