Metallics JSHC712312 1/2-13 x 3-1/2 in. Socket Head Hex Cap Screws - Alloy Steel Black - Each

Yes. The Metallics JSHC712312 is a 1/2-13 UN thread, 13 threads per inch, which is standard 1/2 inch coarse (UNC) pitch. It mates with any 1/2-13 tapped hole, coupling, or hex nut. Length under the head is 3-1/2 inches, so subtract your clamped material thickness to confirm you have enough thread engagement in the tapped member.

Yes. These alloy steel socket head cap screws are rated 180,000 psi minimum tensile and 162,000 psi minimum yield, higher than equivalent sizes of Grade 5 or Grade 8 hex head cap screws, and they do it in a smaller head footprint since they are wrenched internally. Hardness is Rockwell C39. If your drawing calls for Grade 8 in 1/2-13, this meets or exceeds it on tensile.

No. Model JSHC712312 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing requirements you need a domestically produced fastener instead.

The finish is plain black alloy steel, which is an oxide-type bare finish, not a plated corrosion barrier. For exterior, wet, or washdown locations choose a zinc plated or stainless fastener instead. Black alloy socket screws belong in dry interior service: equipment mounting, strut and channel work, machinery, and the electrical, plumbing, and HVAC applications they are catalogued for.

They ship in a jar of 50, and 50 each is the order minimum. Plan quantities in multiples of 50 rather than by the piece.

Yes. At 3-1/2 inches the length is well past 3 times the 1/2 inch nominal diameter, and cap screws of 3D or longer are subject to tensile strength, yield strength, elongation, and reduction of area testing. Elongation is 10 percent minimum on machined specimens at least 4D long, and reduction of area is 33 percent minimum. That matters if you are submitting fastener data on a structural or equipment anchorage package.