Metallics JSPM102SS 12-24 x 3/4 in. Pan Head Slotted Machine Screws - 18-8 Stainless - Each

Yes. The Metallics JSPM102SS is a 12-24 thread, 24 threads per inch, which is the common thread used for grounding lugs, box mounting holes and strut-type bracket hardware. At 3/4 inch long it has enough reach for stacked plates or a box ear plus a bracket, but it is a machine screw, so it needs a tapped hole or a nut, not sheet metal or wood.

Pan head, so it sits on the surface rather than countersinking. Head width runs 0.407 to 0.425 inch and head height 0.112 to 0.125 inch, which is the clearance you need above the work and the bearing footprint over an oversized or slotted hole. If you need the head flush with the surface, this is the wrong head style; use a flat head in a countersunk hole.

Metallics lists the JSPM102SS as both Buy American compliant and ARRA compliant, which is what a public-works or federally funded spec usually asks for on fasteners. Dimensionally the screws are built to ASME B18.6.3-2010 with SAE material standard.

The screws are 18-8 stainless, the common 300-series austenitic grade, so they handle outdoor, damp and washdown locations far better than plated steel and will not rust-bleed on a fixture face. For chloride-heavy coastal or pool chemical exposure, 316 is the step up.

Tensile strength on the 18-8 stainless is 80,000 psi minimum, with hardness in the Rockwell B range. That is below a hardened grade 5 or grade 8 steel fastener, so for a structural or high-torque clamp load you want alloy steel instead. Metallics also notes stainless tensile values are approximations, since there is no single performance standard for stainless machine screws.

Yes, and that is a common use. Unplated 18-8 stainless keeps a bright finish and will not corrode and stain the plate, and the pan head gives a clean rounded profile on the face. The trade-off is the slotted drive, which is slower to drive by power tool than a Phillips or square drive.