Metallics JG8HC417 Bolts 5/16-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$51.37
$1.69
Metallics JG8HC417 Bolts 5/16-18 X 2-1/4 G8 Hxbt St-zn (Jar 50)

Metallics JG8HC417 Bolts 5/16-18 X 2-1/4 G8 Hxbt St-zn (Jar 50)

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Model: JG8HC417
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$51.37
$1.69
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Bolts 5/16-18 X 2-1/4 G8 Hxbt St-zn (Jar 50)

  • Additional Notes

    • Other sizes and quantities available by request

  • Features

    • A cap screw made from medium carbon steel and heat-treated
    • Used in automotive and fleet industries, where greater tensile strength is required than can be met by a Grade-5

Manufacturer Resources

Product Specs

Arra Compliant:
N
Buy American Compliant:
No
Country Of Origin:
MUL
Division:
Electrical H1
Fastener Head Height:
Jul-32 in.
Fastener Head Type:
Hex
Fastener Head Width:
0.489 - 0.500 in.
Fastener Height:
0.195 - 0.211
Fastener Length:
2/1/04
Fastener Width:
0.552 - 0.577
Grade:
8
Hardness:
Rockwell C33-39
Language Code:
EN
Material Standard:
AISI 1021 - 1045
Order Minimum Imperial:
50
Order Minimum Uom Imperial:
EA
Outside Diameter:
0.3065 - 0.3125 IN
Pack Type:
Jar
Product Family:
Electrical Supplies
Product Group:
Fasteners
Sub Division:
Electrical-E H2
Tensile Strength:
150000 psi minimum
Thread Per Inch:
18
Yield Strength:
130000 psi minimum
Department:
Electrical
Product Subgroup:
Bolts
Product Type:
Hexagonal Bolt
Type2:
Hexagonal Bolt
Series:
G8HC and JG8HC
Product Finish:
Zinc
Product Details:
Hexagonal Bolt
Product Material:
Steel

Metallics JG8HC417 – Frequently Asked Questions

1) Is grade 8 stronger than grade 5, and when do I actually need it?
Grade 8 is the step up. The JG8HC417 is medium carbon steel, heat treated, rated 150,000 psi minimum tensile and 130,000 psi minimum yield, with a Rockwell C33-39 hardness. Grade 5 tops out lower, so grade 8 is what gets specified for automotive and fleet work and any joint where the clamp load or shear demand exceeds what a grade 5 handles. The trade-off is that harder steel is less forgiving of shock and corrosion-driven cracking, so for general low-stress mounting a grade 5 is usually the sensible call.
2) Do these Metallics grade 8 bolts qualify for a Buy American or ARRA funded project?
No. The JG8HC417 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. If your job carries a domestic sourcing requirement, this part will not satisfy it.
3) What wrench or socket size fits the head on this 5/16-18 grade 8 hex bolt?
The hex head measures 0.489 to 0.500 inches across the flats, which is a 1/2 inch wrench or socket.
4) Can I use these zinc plated grade 8 bolts outdoors or in a wet location?
The finish is zinc plating over steel, which handles indoor and sheltered conditions and incidental moisture. It is not stainless. For sustained outdoor exposure, washdown, or coastal air the plating will eventually give up and you should be looking at hot dip galvanized or stainless hardware instead. Note that grade 8 bolts are not made in stainless, so if corrosion is the driver you're changing material class, not just finish.
5) How many bolts come in a jar of Metallics JG8HC417 and what is the minimum order?
They ship 50 to a jar, and 50 each is the order minimum. The jar packaging is meant for a truck bin or a shop shelf where you're pulling a handful at a time rather than a bulk box.
6) What steel are Metallics G8HC grade 8 hex bolts made from?
AISI 1021 to 1045 medium carbon steel, heat treated to a Rockwell C33-39 hardness. That heat treatment is what gets the bolt to grade 8 numbers; it also means you should not weld or reheat these, since it destroys the temper and drops the strength back below grade.
7) Does the JG8HC417 come in other lengths or diameters?
The G8HC and JG8HC series covers other sizes and pack quantities beyond the 5/16-18 x 2-1/4 jar of 50, available by request. The JG prefix is the jar-packed version of the same grade 8 hex cap screw.
How fast can I get the Metallics JG8HC417 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics JG8HC417 come with a warranty?
Absolutely. The Metallics JG8HC417 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics JG8HC417?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Metallics JG8HC417 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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