Metallics JMSHC1245 M12 x 45mm Metric Cap Head Hex Cap Screws - Steel Black - Each

Thread pitch is 1.75mm, which is the standard coarse pitch for M12. It will thread into any M12 x 1.75 tapped hole or nut. If your drawing calls out a fine pitch such as M12 x 1.25, this is not the screw for it.

The JMSHC1245 is Class 12.9 with a minimum tensile strength of 1220 N/mm2 and a hardness of Rockwell C39-44. That puts it above Grade 5 or Grade 8 hex head cap screws of equivalent size in tensile strength, and because it is internally wrenched it needs less surface area or counterbore clearance than an externally wrenched hex head.

No. The JMSHC1245 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. If your project has domestic sourcing language in the specs, this fastener will not satisfy it.

The finish is plain black on black steel, which is how metric Class 12.9 socket cap screws are normally supplied. It is a bare, mill-type finish, not a plated or galvanized corrosion coating, so keep these to dry interior or enclosed assemblies. For wet or exterior work, use a plated or stainless fastener instead.

These ship as a jar with a 100-count minimum order. Other sizes and quantities are available by request, so if you need a different length or diameter in the MSHC series, ask.

A socket head cap screw like the JMSHC1245 sits in a straight counterbore and is driven with a hex key from above, so it needs far less clearance around the head than a hex head bolt that has to be reached with a wrench or socket. The head is not tapered, so it will not sit flush in a chamfered seat. For a truly flush face you want a flat head socket screw instead.

Dimensional standard on the JMSHC1245 is ISO 4742. That is the reference for the head and socket geometry, so if a submittal asks which standard the fastener is made to, that is the callout to list alongside the Class 12.9 property class.