quadrant tap bolt 齿节弧形板

cover tap bolt 盖螺栓

Tap-bolt 锥体螺栓

dies plate tap bolt 模板紧固螺栓

hexagonal head tap bolt 六角头螺栓

shouldered tap bolt 带肩螺栓

stay-bolt tap 螺撑丝攻

stove bolt tap 炉用螺栓丝锥

bolt tap 自攻螺栓