Biko mee ka anyị matadayameta, ogologo, ọnụọgụ, ọbụlagodi ibu ma ọ bụrụ na ị nwere, ka anyị wee nwee ike ịnye ihe kachasị mma.
Enwere ASTM ATTM A193 B7, A193 B8, A193 B8M, A193 BURTED Studing, nke nwere ike izute ASTM Standard. Ka ọ dị ugbu a, a na-eji ASTM ASTM A194 2H Hex. Ha abụọ nọ ebe a.
Eri Studing. A na-eji ọrụ njikọ njikọ ahụ iji jikọta igwe ahụ. A na-ejikarị bolts abụọ ahụ na nsọtụ abụọ ahụ, na etiti sucus dị oke ma dị gịrịgịrị. E jikarị ya na igwe na-egwuri egwu, àkwà mmiri, moto, na-eme ihe owuwu, kpọmkwem ụlọ elu, ụlọ na nnukwu ụlọ na nnukwu ụlọ.
1, a na-ejikarị ya rụọ ọrụ buru ibu, dị ka ịwụnye ngwa, dị ka oche, na-eme ka ihe mgbakwunye ahụ mee ihe ma ọ bụ mebiri emebi, iji dochie anya nke isi okpukpu abụọ dị mma. 2. Mgbe ọkpụrụkpụ nke ahụ na-ejikọ ahụ buru oke ibu ma sie ogologo dị ogologo, a ga-eji bolt abụọ abụọ. 3. A na-eji ya jikọta efere dị iche iche na ebe ndị na-enweghị isi na -esi ike iji hex bolts, dị ka ụlọ truss, akwa eze na-agbagide monaoil dụkwa, wdg.