Metallics JMHTB516 Bolts M5 X 16 C8.8 Hx Tap Blt St-zn (Jar 100)

It's an M5 by 16 mm hex head tap bolt, so a 5 mm nominal diameter with a 16 mm length under the head. M5 in the standard metric coarse series runs a 0.8 mm pitch, which is what a standard M5 nut or an M5 tapped hole will accept. Being a tap bolt, it is threaded the full 16 mm rather than having a plain shank, so you get full thread engagement in a short blind hole or a thin tapped bracket.

C8.8 is the metric property class 8.8, the common medium-carbon steel grade for structural and machine fastening, roughly equivalent in strength to SAE Grade 5 in inch sizing. Heads on class 8.8 fasteners are marked 8.8 so an inspector can verify the grade in place. If a drawing calls out class 8.8 M5 hardware, the JMHTB516 meets that callout; if it calls for class 10.9 or stainless A2/A4, this is not a substitute.

The JMHTB516 is steel with a zinc plating (st-zn). Zinc plating is a decorative and mild corrosion coating, fine for dry indoor electrical enclosures, strut, panel work and equipment mounting. For sustained wet exposure, coastal air, or direct contact with treated lumber, step up to hot dip galvanized or stainless metric hardware instead, since plated zinc will bloom and rust in those conditions.

Yes, provided the strut nut is tapped M5. The thread is standard metric coarse M5, and the full-length threading on a tap bolt means the whole 16 mm engages the channel nut instead of a plain shank sitting in the channel opening. Check the tapped size on your channel nuts first, as a lot of North American strut is tapped in inch sizes such as 1/4-20 or 3/8-16, which this bolt will not enter.

One hundred M5 x 16 hex tap bolts per jar, packaged in a screw-top jar rather than a bag or box. That's a shop or service-truck quantity for an electrician or maintenance tech doing repeated panel, strut and equipment fastening, and the jar keeps small 5 mm hardware from scattering in a gang box.

Order Metallics part number JMHTB516. That single part number covers the M5 x 16 class 8.8 zinc plated steel hex tap bolt in the 100-piece jar, so there are no length, finish or pack options to specify on top of it.