aerospace bolts derived it name lap joint as it is to be joint with a joint stub end. The flange has curved radius at its bore to accommodate a aerospace bolts . A aerospace bolts is similar in some ways as slip-on flange as a stub end is slipped on the flange having slightly larger radius then the stub end joint. lap joint stub and flange are joint together to make a assembly. Thus lap joint flange allows easy dismantling of system assembly. We manufacture lap joint flange in different sizes and standards.