Metallics JQK22V 10 x 1-1/2 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Steel Zinc - Each

Two options on the JQK22V: a 1/4 inch hex socket on the head, or a slotted blade. Head width measures 0.244 to 0.25 inch across the hex, and the slot runs 0.045 to 0.054 inch wide by 0.052 to 0.074 inch deep. Most installers run a 1/4 inch magnetic hex driver in an impact or screwgun and keep the slot as the backup for hand driving in tight spots.

No. The sharp point on the JQK22V pierces and taps its own hole in sheet metal, so there is no pre-drilling step. Twin lead threads cut driving torque, which keeps the point from walking or stripping as it starts. The screw is hardened to Rockwell C28-38 so the threads hold their form going through steel.

Yes. The JQK22V is flagged both ARRA compliant and Buy American compliant, which is what a government, school district or transit submittal will ask for. Country of origin is listed as multiple, so if your spec requires a single named origin, confirm the lot before submitting.

It ships as a 500-count jar, and 500 is the order minimum. Figure roughly 4.22 lbs for the packed jar. If you need a different count or a different length in the JQK series, Metallics offers other sizes and quantities by request.

The JQK22V is carbon steel with a zinc finish, made from AISI 1018 to 1022 steel. Zinc plating is a dry-location and indoor-protected coating, fine for interior electrical work, strut, and box or bracket mounting. For exterior, roof, or wet locations, go to a stainless or a coated exterior-rated fastener instead.

The head carries an integral washer with a 0.384 to 0.414 inch outside diameter and a washer thickness of 0.019 to 0.031 inch. Head height runs 0.096 to 0.11 inch. That washer face spreads the clamp load over thin sheet, which is why it is used on light-gauge metal where a plain hex head would dish the material.

Head geometry on self-piercing screws is not the same as on standard tapping screws, and there is no single industry standard for self-piercing head dimensions. Metallics publishes the JQK22V values as a guide: 0.244 to 0.25 inch head width, 0.096 to 0.11 inch head height, with deviation possible. If you are matching an existing driver set or a countersink, work to that range rather than to a standard tapping screw chart.