8-15 x 3/8 Slot Ind HWH 1/4" Across The Flats F/T Self Piercing Scr Needle Point Zinc M12 They have a wing design

They have a wing design for easy hand-tightening and removal

This 1/4-20 x 1/2" fully threaded machine screw features an indented hex washer head for a secure and stable hold

while the hex shape provides a secure grip for tightening and loosening

The 4-40 x 3/8 Unslotted Indented Hex Head Machine Screw Fully Threaded Zinc is a versatile and durable fastener designed for various applications

These 1/4-20 Serrated Flange Hex Lock Nuts are constructed from durable steel and feature a zinc yellow finish for corrosion resistance

8-15 x 3/8 Slot Ind HWH 1/4" Across The Flats F/T Self Piercing Scr Needle Point Zinc M12 They have a wing designThese 8 15 x 3 8 Slot Ind HWH 1 4" Across The Flats F T Self Piercing Scr Needle Point Zinc are designed for use in a variety of industrial applications. They are made of high quality zinc and feature a self piercing needle point that makes them easy to insert into metal. The 1 4" across the flats head makes them easy to tighten and remove. These screws are also heat treated for increased strength and durability.