Metallics JSHC71234 1/2-13 x 3/4 in. Socket Head Hex Cap Screws - Alloy Steel Black - Each

The Metallics 1/2-13 alloy steel socket head cap screw runs 180,000 psi minimum tensile and 162,000 psi minimum yield, hardness Rockwell C39. Per the product data it supplies greater tensile strength than equivalent sizes of Grade 5 or Grade 8 hex head cap screws, and because it is wrenched from the socket it needs less surface area or counterbore around the head.

Yes. It is a UN thread at 13 threads per inch on a 1/2 in. nominal diameter, which is standard 1/2-13 UNC coarse, so it mates with any 1/2-13 tapped hole or nut.

Head width is 0.735 to 0.75 in. and head height is 0.492 to 0.5 in., so plan a counterbore slightly over 3/4 in. diameter and at least 1/2 in. deep if you want the head flush or below the surface. Dimensions follow ASME B18.3-2012.

No. The JSHC71234 cap screw is not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. For a project with domestic content requirements you need a fastener specifically certified as domestic.

It is internally wrenched with a hex (Allen) drive, not an external hex head, so you drive it with a hex key or hex bit socket rather than a wrench on the head. The socket depth is 0.245 in., which is what your key needs to seat into.

The finish is plain black on alloy steel with no corrosion-resistant plating stated, so it is an indoor or dry-location fastener. For damp, exposed, or washdown work, specify a zinc-plated or stainless socket head cap screw in the same 1/2-13 x 3/4 size instead.

They ship in a jar, with an order minimum of 100 pieces per jar. If you need a different size or a different count, Metallics lists other sizes and quantities as available by request.

Metallics lists the field application as the electrical, plumbing, heating and air conditioning industries, typical uses being equipment mounting, strut and bracket assembly, and machine or panel work where a high strength screw has to sit in a counterbore. The internally wrenched head is what lets it go into tight spots where a hex head needs clearance for a wrench.

Alloy steel at Rockwell C39 with elongation of 10 percent minimum and reduction of area of 33 percent minimum on machined specimens of at least 4D length. That is a hardened fastener with limited ductility by design, so it holds high clamp load but is not intended to be bent or reused after being torqued to yield.