Abstract: A slotted set screw includes a shank, a slot, a cut metal waste storing recess and an outer thread portion. The slot is provided at an end of the shank and includes an opening and a slot bottom surface. The cut metal waste storing recess is provided on the opening of the slot and includes a first vertical wall, a second vertical wall and a horizontal bottom surface. A first horizontal bottom edge connects between the first vertical wall and the horizontal bottom surface while a second horizontal bottom edge connects between the second vertical wall and the horizontal bottom surface. An included angle is formed between the first horizontal bottom edge or the second horizontal bottom edge and a longitudinal axis of the slot less than a right angle. In an embodiment, the bottom surface is lower than a level of the slot bottom surface in a vertical direction.

Abstract: A screw includes a shank portion, an outer thread portion and a laterally-extruded thread portion. The shank portion has an outer circumferential surface on which to form the outer thread portion having grooves.

Abstract: A slotted set screw includes a shank, a slot, a cut metal waste storing recess and an outer thread portion. The slot is provided an end of the shank and includes an opening and a slot bottom surface. The cut metal waste storing recess is provided on the opening of the slot and includes a first vertical wall, a second vertical wall and a horizontal bottom surface. A first horizontal bottom edge connects between the first vertical wall and the horizontal bottom surface while a second horizontal bottom edge connects between the second vertical wall and the horizontal bottom surface. An included angle is formed between the first horizontal bottom edge or the second horizontal bottom edge and a longitudinal axis of the slot less than a right angle. In an embodiment, the bottom surface is lower than a level of the slot bottom surface in a vertical direction.

Abstract: A magnesium fastener manufacturing method includes the steps of: using a magnesium or a magnesium alloy to form a magnesium wire or a magnesium rod; processing cold forging, warm forging or hot forging the magnesium wire or the magnesium rod to form a magnesium fastener member. When processing warm or hot forging, a directly heating treatment, a thermal isolating and directly heating treatment, or a directly heating and thermal isolating treatment is selectively applied to heat the magnesium wire or a magnesium rod to a predetermined temperature.

Abstract: A magnesium nut manufacturing method includes the steps of: providing a magnesium wire or rod; processing a directly-heating procedure, a thermal insulation material coating and directly-heating procedure or a directly-heating and thermal insulation material coating procedure on the magnesium wire or rod; forming a nut blank and a through hole thereof from the magnesium wire or rod, with the through hole having an inner thread to produce a magnesium nut member.

Abstract: A magnesium screw manufacturing method includes the steps of: providing a magnesium wire or rod; processing a directly-heating procedure, a thermal insulation material coating and directly-heating procedure or a directly-heating and thermal insulation material coating procedure on the magnesium wire or rod; forming a screw head and a screw thread of a screw blank from the magnesium wire or rod to produce a magnesium screw member.

Abstract: A slotted set screw includes a slot in an upper end surface and a cut metal waste storing recess respectively formed at two ends of the slot. The cut metal waste storing recess is defined by a vertical wall and a flat bottom wall to have a large opening, separated from the slot for a little distance. The opening of the cut metal waste storing recess communicates with the outside of the threads of the set screw. Thus, cut metal waste may be stored in the cut metal waste storing recesses during cutting threads of the set screw and cannot fall into and remain in the slot to result in extra cleaning work for the waste in the slot.

Abstract: A slotted set screw includes a slot in an upper end surface, and a cut metal waste storing recess respectively formed at two ends of the slot. The cut metal waste storing recess is defined by a vertical wall and a flat bottom wall to have a large opening, separated from the slot for a little distance. The opening of the cut metal waste storing recess communicates with the outside of the threads of the set screw. Thus, cut metal waste may be stored in the cut metal waste storing recesses during cutting threads of the set screw, without falling into and remaining in the slot to result in extra cleaning work for the waste in the slot.