Metallics JQK15V 8 x 1 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Steel Zinc - Each

The JQK15V ships in a jar of 500, and 500 count is the order minimum. The packed jar weighs 2.7 lbs. If you need a different size or quantity in this self-piercing line, Metallics states other sizes and quantities are available by request.

No. The JQK15V has a sharp point and self-piercing, self-tapping threads, so it pierces and forms its own thread in thin-gauge sheet metal without a pilot hole. The twin lead threads cut driving torque, which matters when you are running hundreds of them into strut, boxes, or duct by screwgun.

It takes a 1/4 inch hex nut driver or socket. The hex head measures 0.244 to 0.25 in. across and stands 0.096 to 0.11 in. high. The head is also slotted, with a slot 0.045 to 0.054 in. wide and 0.052 to 0.074 in. deep, so a flat blade screwdriver works for hand starts or tight spots where a nutsetter will not fit.

Metallics lists the JQK15V as both Buy American compliant and ARRA compliant. Country of origin is listed as multiple, so if your specification requires documented origin on a per-lot basis, request the certification for the lot you receive.

Yes, the head carries a washer face with an outside diameter of 0.322 to 0.348 in. and a thickness of 0.019 to 0.031 in., so it spreads bearing load on sheet metal instead of dimpling through it. There is also an undercut beneath the head that gives you more usable thread engagement in thin material.

The JQK15V is zinc plated carbon steel, which handles indoor and protected damp conditions but is not a stainless fastener. For sustained exterior exposure, wash-down areas, or coastal work, specify stainless. Base metal is AISI 1018 to 1022 steel, case hardened to Rockwell C28-38 so the point can pierce sheet metal.

No, and Metallics says so directly: head dimensions on self-piercing screws differ from standard tapping screws, and there is no single industry standard for self-piercing screw dimensions. The figures given, such as the 0.244 to 0.25 in. head width, are a guide and small deviations can occur. If a tight hole or a recessed pocket depends on head size, check a sample from the jar first.