Metallics JSS1438SS Screw 1/4-20 x 3/8 SKT S-Scr Cup 18- (Jar 100)

Yes. The JSS1438SS is an 18-8 stainless socket set screw, which is the common austenitic stainless grade used for corrosion resistance in damp, outdoor, and coastal electrical work. If you are setting screws in a wet location enclosure or exterior lug, this is the material you want over plain steel.

Each jar holds 100 of the 1/4-20 x 3/8 inch stainless socket set screws. The jar pack is aimed at MRO and service-van stocking, where you want a countable quantity of one size on the shelf rather than a bulk box.

No screwdriver. Socket set screws are driven with a hex key (Allen wrench) seated in an internal socket, not an external head, so there is nothing for a blade or Phillips bit to grab. Plan on a hex key sized to the 1/4-20 screw.

The 3/8 inch length is the full thread length of the screw, measured end to end on a set screw since there is no protruding head. In a boss or collar tapped deeper than 3/8 inch the screw will seat below the surface and may not reach the conductor, so match the length to the wall thickness plus the gap you need to close.

A cup point bites into the mating surface and holds under vibration, which is why it shows up in lug and connector bodies, ground clamps, bus hardware, and collars that clamp onto a round conductor or shaft. The cup rim digs a shallow ring into the part, so expect it to mar whatever it bears on. If you need a non-marring hold, a flat or nylon-tipped point is the better choice.

Order Metallics part number JSS1438SS. That single number covers the 1/4-20 x 3/8 inch 18-8 stainless cup point socket set screw in the 100-count jar; there are no finish or length options under it.