QJ 531-1985 拉铆型抗拉密封平圆头环槽铆钉钉杆

QJ 531-1985 The head of the ring bolt is flat and has a round cross-section, and the head of the ring bolt is inserted into a round hole to form a sealed joint. The shank of the ring bolt is threaded and used to fasten the ring bolt to a metal surface. The English translation of "Laser-headed Antistatic Sealing Ring Bolt" is "Laser-headed Antistatic Sealing Ring Bolt"