Metallics JDS186SS Screws 12 X 1/2 Ih Hx 5/16Hd Sl TS SS (Jar 100)

They are #12 x 1/2 inch screws with an indented hex washer head taking a 5/16 inch driver, and the head is also slotted so you can drive them with a flat blade screwdriver if a nut driver won't fit the space. Thread is tapping type, and the material is stainless steel.

Each jar holds 100 screws. The jar pack is the ordering unit, so it suits a service van or a shop bin where you are pulling a handful at a time rather than buying by the box of thousands.

Stainless is the reason to pick this one. The JDS186SS is a stainless steel screw, so it holds up in wet locations, exterior enclosures and corrosive environments far better than a plain or zinc plated tapping screw of the same #12 x 1/2 inch size. Stainless is also the right choice when you don't want rust bleed on a finished surface.

No tapping is needed. The JDS186SS is a tapping screw, so it forms its own thread as it drives into a pilot hole in sheet metal, a box or a strut. You still want a pilot hole sized for a #12 thread; it is not a self-drilling point screw, so it will not start its own hole in steel.

This is the general purpose sheet metal fastener for electrical rough-in: attaching covers and plates to boxes and enclosures, fastening clamps and straps, mounting small devices and brackets to metal studs or strut. The indented hex washer head spreads the clamp load and seats flat without needing a separate washer, and the 1/2 inch length keeps the point from protruding far behind thin material.

Order it as Metallics JDS186SS. That number covers the #12 x 1/2 inch indented hex head, 5/16 inch head, slotted, tapping, stainless steel screw in the 100 count jar.