【建筑】螺丝扳手【机械工程】螺丝钥匙

hexagonal socket head cap screw

outside screw and yoke type

acme screw thread【机】;trapezoidal thread【机】

jacking screw

screw conveyer

fastening screw【机】;trip bolt【机】;

crank connecting rod hinge screw

pitch of screw (thread)