Metallics JG8HC23 Bolts 3/8-16 X 1-1/2 G8 Hxbt St-zn (Jar 100)

It is a 3/8 bolt cut at 16 threads per inch, with a measured outside diameter of 0.3690 to 0.3750 inch. Any 3/8-16 nut or tapped 3/8-16 hole will accept it. If the hole in your channel or bracket is tapped 3/8-24, this bolt will not thread in and you need the fine-thread version instead.

No. The Grade 8 hex bolt is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded job with domestic sourcing requirements, you will need a domestically produced Grade 8 fastener instead.

The head is a hex measuring 0.551 to 0.562 inch across the flats, which is a 9/16 inch wrench or socket. That is the standard across-flats size for a 3/8 diameter hex cap screw, so your existing 9/16 socket or impact set covers it.

It ships in a jar of 100 pieces, and the jar is the order minimum, so 100 bolts is the smallest buy. Metallics notes that other sizes and quantities in the G8HC and JG8HC series are available on request.

The bolt is medium carbon steel with a zinc finish, per AISI 1021-1045 material. Zinc plating is a mild corrosion barrier, fine for indoor mechanical rooms, strut and equipment mounting, and protected exterior locations. For continuous wet exposure, coastal air, or direct ground contact, zinc plated steel is not the right choice and you want hot dip galvanized or stainless. Note also that Grade 8 strength is not available in standard stainless, so if you need both corrosion resistance and this strength level, that is a specification conversation.

Metallics part number JG8HC23 covers the 3/8-16 x 1-1/2 Grade 8 hex bolt, steel with zinc plating, in a 100 piece jar. The J prefix denotes the jar pack within the G8HC and JG8HC Grade 8 hex bolt series; the G8HC numbers are the same bolt in other pack configurations.