Ngwaahịa a nwere:ịghasa, ihu n'akpachapụ anya annular, aka aka uwe, gasket, aku.
Ihe mgbochi arịlịka:nkịtị 4.9 na 8.8, 10.8, 12.9 alloy ígwè na A4-80 igwe anaghị agba nchara.
A na-eme ka elu ya dị galvanized:
Ọkpụrụkpụ nke mkpuchi galvanized bụ ≥5 microns, a na-ejikwa ya na ime ụlọ na n'èzí nkịtị;
Ọkpụrụkpụ nke mkpuchi galvanized bụ>50 microns, a na-ejikwa ya na gburugburu ebe na-emebi emebi;
Enwere ike ịkwalite ọgwụgwọ elu dị ka ihe ndị chọrọ mgbochi corrosion si dị, a pụkwara ime ọgwụgwọ mgbochi corrosion nke sherardizing ma ọ bụ karịa;
A4-80 igwe anaghị agba nchara maka ojiji na gburugburu corrosive.