Metallics JSHC10321 Screw 10-32 x 1 SHCS St-Blk (Jar 100)

It's a 10-32 x 1 inch socket head cap screw, so 32 threads per inch on a #10 machine screw diameter, one inch long. That's a standard UNF machine thread, which means it mates with a 10-32 tapped hole or a 10-32 nut, not with a sheet metal or self-tapping hole.

SHCS is socket head cap screw, meaning a cylindrical head with an internal hex socket. You drive it with a hex key (Allen wrench), not a screwdriver. The recessed socket lets you seat it in a counterbored hole and get high torque on it in tight spaces where a screwdriver blade would slip.

These are steel with a black finish (St-Blk), which is a plain black oxide type finish rather than a zinc or stainless corrosion coating. Keep them to dry indoor work, enclosures, panels, and interior mounting. For wet locations, exterior work, or anywhere washdown or condensation is a factor, go with a stainless or hot dip galvanized fastener instead.

10-32 is the standard machine thread used for ground screws and for the tapped holes in steel boxes, enclosures, and device mounting, and Metallics sells the JSHC10321 as an electrical fastener. The caution is the head style and finish: a socket head needs a hex key and the black steel finish is not a corrosion-rated plating, so for a grounding conductor termination most inspectors expect the green-coated or plated ground screw made for that purpose. Use this one for mechanical mounting into 10-32 tapped holes.

100 screws per jar. Metallics packs this one in a jar rather than a box, which is the format most electricians keep on the van or on a shop shelf because you can scoop a handful without the pack falling apart. One jar is the order unit, so buying for several panels means buying in multiples of 100.

Order Metallics JSHC10321. The J prefix is the jar pack, SHC is socket head cap, and 10321 reads as 10-32 by 1 inch. That single manufacturer part number covers the item, there are no finish or length options branching off it.