Metallics JTTS20 8 x 3/4 in. Pan Head Tri-Drive Tapping Screws - Steel Zinc - Each

Tri-drive means the pan head is machined to take three different drivers: a flat blade in the slot, a Phillips bit, or a square (Robertson) bit. On a service call that means whatever is already in your pouch will turn it, and you can back one out that a previous crew drove with a different bit without chewing the recess.

It is a #8 diameter screw, 3/4 inch long, with a pan head. That length is the common pick for fastening device straps, box covers, plates and light brackets where you only have thin material to bite and do not want the point coming through the back.

The JTTS20 is steel with a zinc plating, which handles indoor and normally dry or occasionally damp conditions. For sustained wet, exterior, or corrosive exposure, zinc plated steel is the wrong choice and you want stainless instead.

It is a tapping screw, so it cuts its own thread as it drives into sheet metal, steel boxes, enclosures and brackets. Thin gauge sheet usually takes it straight in; thicker steel still wants a pilot hole sized to the screw's root so you are not snapping the shank.

A pan head sits on top of the material with a flat bearing underside and a rounded crown, so it clamps a strap, plate or cover without needing a countersunk hole. If you need the head flush with the surface, use a flat head in a countersunk hole instead; if you need a wider bearing surface over an oversized or slotted hole, a truss or washer head covers more.

Yes, the JTTS20 #8 x 3/4 inch pan head tri-drive tapping screw is made in the USA. That matters on public and institutional work where the submittal asks for domestic fasteners.

They ship in a jar, which is what you want for truck stock and shop bins; the jar keeps a loose count of #8 screws together instead of scattering through a drawer. Order the part as JTTS20.