Metallics JSHC584 5/8-11 x 4 in. Socket Head Hex Cap Screws - Alloy Steel Black - Each

The JSHC584 is an alloy steel socket head cap screw rated at 170,000 psi minimum tensile and 153,000 psi minimum yield. That puts it above a Grade 8 hex head cap screw in the same 5/8-11 size, and because it is internally wrenched with a hex key you need less surface area or counterbore clearance around the head than a wrench-flat bolt requires. Hardness is Rockwell C37.

The JSHC584 is cut to 5/8-11 UN thread, 11 threads per inch, which is standard 5/8 inch coarse (UNC) pitch. It mates with any 5/8-11 tapped hole, coupling nut, or strut hardware. It will not engage a 5/8-18 fine thread hole. Dimensionally it is made to ASME B18.3-2012, the socket cap screw standard.

No. The JSHC584 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. If your project carries domestic sourcing language, this fastener will not satisfy it.

Fastener length on the JSHC584 is 4 in., measured from under the head to the tip, since socket cap screws are not a flush-seating head. Add the 0.616 to 0.625 in. head height on top of that if you are checking clearance above the work surface. For stacked steel, figure your total material thickness plus enough protrusion for full nut engagement.

An Allen (hex) key. The head is a socket type with a hex drive, so it is driven internally rather than with an open-end or socket wrench on flats. Socket depth is 0.307 in., which tells you how far the key seats.

These ship in a jar with a 25 each order minimum, so the smallest buy is a 25-piece jar rather than a single screw. Other sizes and quantities can be arranged by request.

The JSHC584 is alloy steel with a black finish, which is a plain black oxide type coating rather than zinc or hot dip galvanizing. It is fine for indoor and enclosed work (electrical, plumbing, heating and air conditioning applications), but for wet or exterior exposure you want a zinc plated or galvanized fastener instead.

Yes, at this length. Cap screws 3D or longer (D being the nominal diameter) get tensile, yield, elongation and reduction of area testing, and a 4 in. screw on a 5/8 in. diameter is well past that threshold. Elongation is 10% minimum and reduction of area is 33% minimum on machined specimens.

Listed weight is 5.75 lbs for the jar, with packaged dimensions of 4.5 x 4.5 x 7.25 in. Useful if you are consolidating a parts order or checking a shelf bin.