Metallics JSHC141SS316 Screw 1/4-20 x 1 SHCS 316 SS (Jar 100)

It's a 1/4-20 x 1 inch socket head cap screw, so a 1/4 inch diameter body with 20 threads per inch (standard UNC coarse thread) and a 1 inch shank length under the head. It drives with a hex key in the socket recess rather than a screwdriver, which is what lets you pull it tight in a counterbored or tight-clearance spot.

The JSHC141SS316 is 316 stainless, the marine grade. Compared with standard 18-8 (304) stainless, 316 adds molybdenum and holds up better against chlorides, so it's the one to use near salt air, on rooftops, in wash-down areas, and in water or chemical treatment plants. For dry indoor panel work 18-8 is usually enough; outdoors on the coast, 316 is the reason to pay the difference.

100 pieces per jar. Metallics packs these in a jar rather than a bag, which is handy on a service truck or a shop bench since it reseals and stays upright in a bin. If you need a count for a job, work in multiples of 100.

Yes. 1/4-20 is one of the common UNC sizes used across channel and strut nuts, clamp hardware, and enclosure mounting, so the JSHC141SS316 mates with any 1/4-20 tapped hole or nut. For a strut nut connection, match the 316 stainless screw with a 316 or at minimum stainless nut and washer, since mixing stainless with plain or zinc hardware in a wet location gives you galvanic corrosion at the one piece you didn't upgrade.

The socket drive is the difference. A hex key engages from directly above, so you can set these in a counterbore flush with the surface or reach a fastener boxed in by conduit and gear where a wrench has no swing room. A hex head bolt needs side clearance for a socket or open-end wrench. Trade-off: once a socket fills with paint or grit you need to clean it out before the key seats, and a rounded socket is harder to back out than a rounded hex flat.

Stainless on stainless does gall, and 1/4-20 is small enough that a seized screw usually snaps before it backs out. Run them in slowly, skip the impact driver on final tightening, and use an anti-seize compound on the threads when you're making a joint you expect to take apart later. This matters more on the 316 grade because it's typically going into outdoor assemblies that get serviced.