Metallics JQK16W 8 x 1-1/4 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Gray - Steel Zinc - Each

Yes. The JQK16W is a sharp point self-piercing and tapping screw, so it pierces and taps its own hole in sheet metal as it drives. Twin lead threads cut driving torque, and the screw body is heat treated to Rockwell C28-38 so the point holds up while it forms the thread.

Either. The head is a 1/4 inch hex with a slotted drive cut into the top, so a 1/4 inch hex driver or nutsetter works, and a flat blade will also turn it. The slot runs 0.045 to 0.054 in. wide and 0.052 to 0.074 deep, so use a thin cabinet-tip blade rather than a wide one if you drive it by screwdriver. Head width measures 0.244 to 0.25 in. across, head height 0.096 to 0.11 in.

Metallics lists the JQK16W as both ARRA compliant and Buy American compliant. Country of origin is China, so if your contract is written to a domestic-melt or domestic-manufacture requirement rather than a Buy American trade-agreement provision, verify the clause language against your spec before submitting.

They ship in a jar with a 100-count minimum, so 100 pieces is the smallest order quantity. The filled jar weighs 0.63 lbs. Metallics offers other sizes and quantities in this line by request.

Yes, there is an integral washer under the hex head, 0.322 to 0.348 in. outside diameter and 0.019 to 0.031 in. thick. That gives you more bearing surface against thin sheet or a device strap than a plain hex head. There is also an undercut beneath the head so more of the thread engages the material.

15 threads per inch on the #8 x 1-1/4 in. JQK16W. Note that self-piercing screw head dimensions are not the same as standard tapping screws, and there is no single industry standard for self-piercing dimensions, so treat the published head and washer figures as a guide when you are matching an existing fastener.

The JQK16W is steel with a zinc plated finish, which is a general purpose indoor and protected-location coating. For wet, coastal, or corrosive environments a stainless or hot dip galvanized fastener is the usual call instead. Base steel is AISI 1018 to 1022.

The head is finished white, which is why electricians reach for this one when fastening to white covers, white raceway, or painted white trim. The screw body underneath is zinc plated steel.