Metallics JG8HC114 Bolts 1/4-20 X 1-1/4 G8 Hxbt St-zn (Jar 100)

It's a 1/4-20 coarse thread, 20 threads per inch, with a measured shank outside diameter of 0.2450 to 0.2500 inch. Any standard 1/4-20 nut or tapped 1/4-20 hole will take it. Length under the head is 1-1/4 inches.

Grade 8 is the higher-strength option: 150,000 psi minimum tensile and 130,000 psi minimum yield, with a hardness of Rockwell C33-39. Grade 5 tops out lower, which is exactly why this one gets specified in automotive and fleet work where a Grade 5 won't carry the load. It's medium carbon steel, heat treated, per AISI 1021-1045.

No. It is not Buy American compliant and not ARRA compliant, and country of origin is listed as multiple. If your contract carries domestic sourcing language, this bolt won't satisfy it.

The hex head measures 0.428 to 0.438 inch across the flats, so a 7/16 inch socket or wrench is the fit. Standard hex head, no washer face shoulder to work around.

They ship 100 to a jar, and the jar is the minimum order unit, so 100 pieces is the smallest quantity. Filled jar weighs about 953 g. Metallics lists other sizes and quantities in the G8HC and JG8HC series on request.

The finish here is zinc plating over steel, which handles indoor and sheltered conditions and gives moderate corrosion protection. For sustained outdoor exposure, wet process areas, or coastal air, zinc plated carbon steel will eventually rust at any nick in the plating, so stainless or hot dip galvanized is the better call there. Note that galvanizing is generally not applied to Grade 8 because of hydrogen embrittlement risk.

Yes, that's a listed application: electrical, plumbing, heating and air conditioning work. A 1/4-20 x 1-1/4 hex cap screw suits strut hardware, equipment feet, hanger assemblies, and panel mounting. Where vibration and load are the concern, the Grade 8 strength is the reason to pick it over a general purpose bolt.

At 1-1/4 inch length, a 1/4-20 hex cap screw is short enough that it is typically threaded nearly the full length, so you get usable thread engagement through thin to medium stack-ups. Measure your material thickness plus washer and nut and keep at least a couple of threads past the nut. Shank diameter is 0.2450 to 0.2500 inch, so clearance holes are usually drilled 9/32 or 5/16 inch.