Metallics JSHC58214 5/8-11 x 21/4 in. Socket Head Hex Cap Screws - Alloy Steel Black - Each

This alloy steel socket head cap screw is rated 170,000 psi minimum tensile and 153,000 psi minimum yield, with a hardness of Rockwell C37. Per the manufacturer data it delivers greater tensile strength than equivalent sizes of Grade 5 or Grade 8 hex head cap screws, and because it's internally wrenched it needs less surface area or counterbore clearance than a hex head.

No. The JSHC58214 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. For a job carrying domestic sourcing requirements you'll need a fastener with documented US origin.

It's an internal hex (Allen) drive, not an external hex head, so you need a hex key or socket bit rather than a wrench. The socket depth is 0.307 inch. Head width runs 0.921 to 0.938 inch and head height 0.616 to 0.625 inch, which is what you size the counterbore and clearance to.

Yes, if the counterbore is cut to ASME B18.3 dimensions for 5/8 inch. The head measures 0.921 to 0.938 inch across and 0.616 to 0.625 inch tall, so bore at least 0.625 inch deep to bring the head below the surface. A cylindrical socket head is the usual choice precisely because it buries in a smaller bore than a hex head needs.

They ship in a jar of 25, which is the order minimum (25 each). Model JSHC58214. Packed weight is 3.5 lbs.

The JSHC58214 is plain alloy steel with a black finish, not plated or galvanized. Black oxide style alloy fasteners are a dry-location, indoor or protected-equipment item; they will rust if left wet or exposed. For damp or exterior work, specify a zinc plated or stainless socket cap screw in the same 5/8-11 size instead.

Metallics states that cap screws of a length 3D or greater (three times the nominal diameter) are subject to tensile strength, yield strength, elongation and reduction of area testing. The published values are 10% minimum elongation on machined specimens and 33% minimum reduction of area, alongside 170,000 psi tensile and 153,000 psi yield minimums.

Metallics positions the SHC series for the electrical, plumbing, heating and air conditioning industries, typical MRO and equipment-mounting work where a high strength internally wrenched fastener fits in tight clearance. Common uses are strut and bracket anchoring, machine and motor mounts, and panel or enclosure hardware in dry locations.