Metallics JMSHC650 M6 x 50mm Metric Cap Head Hex Cap Screws - Steel Black - Each

It is an M6 screw with a 1 mm thread pitch, which is the standard coarse metric thread for M6. It will thread into any standard M6 x 1 tapped hole or nut. Overall length is 50 mm.

It takes a 5 mm hex key. The internal socket measures 5.020 to 5.084 mm across the flats and 5.72 mm across the corners, so a 5 mm metric Allen key is the correct driver, not an SAE/inch key.

Yes. The JMSHC650 is metric Class 12.9 with a minimum tensile strength of 1220 N/mm2, which is higher than the equivalent size in Grade 5 or Grade 8 hex head cap screws. Hardness is Rockwell C39-44. Because it is internally wrenched with a hex socket, it also needs less surface area or counterbore clearance than an external hex head of the same strength.

No. The JMSHC650 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. For federally funded work carrying those requirements you need a domestically sourced fastener.

It is the plain black oxide-style finish that Class 12.9 socket cap screws are normally supplied with, on black steel. Treat it as a bare, uncoated fastener for corrosion purposes: it is fine for dry interior structural and equipment work, but for wet or exterior locations you want a plated or stainless fastener instead.

The JMSHC650 is built to ISO 4742 dimensionally, in metric Class 12.9. That matters when the drawing calls out a metric socket head cap screw by ISO number rather than by brand.

They ship in a jar, with a minimum order of 100 pieces (one count unit). Other sizes and quantities are available by request.

That is exactly where it wins. A socket cap screw like the JMSHC650 is wrenched from inside the head with a hex key, so it needs less surface area or counterbore around the head than an external hex head bolt of the same strength. Use a hex head cap screw instead when you need to torque it with a socket or open-end wrench and head clearance isn't the problem.