domed nut: 1size range: M16,M30 2grade:4,6,8,10 3standard: ... ,UNI,ISO,GB 4certificata:SGS M4-M20 Metric steel long cap nut product namecap nutsproducer' s markSDLstandardASTM, BS, UIC, JIS, GOST, DIN ... ,SGS2.Various MEDALS certificate 3. Product Figure Various types of cap nuts4. Factory view figures:packagingfactory viewTesting equipmentsWorkshop Welcome your visit ...