自销螺母 self locking nut

销螺母 pin nut

销轴、螺母 Disc Hinge

副簧螺母销 auxiliary spring nut pin

十字头圆销螺母 [机] crosshead pin nut ; crosshead wrist pin nut

肘销螺母 [机] Knuckle pin nut

支销槽顶螺母 fulcrumpincastlenut

关节销螺母 knuckle-pin nut

锚定销防松螺母 anchor pin locknut

肘节销螺母垫圈 wrist-pin nut wahser