杆径＞6mm的其他螺钉及螺栓（不包括不锈钢紧固件）(不论是否带有螺母或垫圈，非用于民用航空器维护和修理的)

Other screws and bolts, stem diameter more than 6mm( whether or not with their nuts or washers, not used for the maintenance and repair of Civil Aircraft)