E nwere ụdị dị iche iche ASME B16.11 na-agba aja agba, dịka òtù, dị ka Elking Fitking, dị ka Elking, Cross, tee, ọkara, onyeisi, CAST, Unipolet; Ọ bụ ezie na enwere ike inye fitt na-eri nke ukwuu na ngwaahịa iki mma, obe, tee, ọkara, onye isi, okpu, plọg na igbo.