Metallics JG8HC13 Bolts 5/16-1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.84
$1.93
Metallics JG8HC13 Bolts 5/16-18 x 1-1/2 G8 HXBT St-zn (Jar 100)

Metallics JG8HC13 Bolts 5/16-18 x 1-1/2 G8 HXBT St-zn (Jar 100)

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Model: JG8HC13
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$50.84
$1.93
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Bolts 5/16-18 x 1-1/2 G8 HXBT St-zn (Jar 100)

  • Features

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

  • Additional Notes

    • Other sizes and quantities available by request

Manufacturer Resources

Product Specs

Arra Compliant:
N
Buy American Compliant:
No
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:
1/1/02
Fastener Width:
0.552 - 0.577
Field Application:
Electrical, Plumbing, Heating and Air Conditioning Industries
Grade:
8
Hardness:
Rockwell C33-39
Language Code:
EN
Material Standard:
AISI 1021 - 1045
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Gr_8_Hex_Bolt_St-Zn.pdf
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
JR
Outside Diameter:
0.3065 - 0.3125 IN
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
5.75 in
Product Length:
3.5 in
Product Weight:
1783 g
Product Width:
88.9 MM
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 JG8HC13 – Frequently Asked Questions

1) What thread does the Metallics JG8HC13 5/16 hex bolt take, and will it run into a standard 5/16-18 nut?
It's a 5/16-18 thread, 18 threads per inch, which is standard UNC coarse for 5/16. Any 5/16-18 coarse nut or tapped hole will take it. Shank outside diameter runs 0.3065 to 0.3125 in. For a Grade 8 bolt loaded near its rating, pair it with a Grade 8 nut and hardened washer so the nut isn't the weak point.
2) Is a Grade 8 bolt stronger than the Grade 5 I'm replacing?
Yes. The JG8HC13 is Grade 8 with 150,000 psi minimum tensile and 130,000 psi minimum yield, hardened to Rockwell C33-39. Grade 5 of the same diameter is rated lower, which is why these get specified in automotive and fleet work where Grade 5 won't carry the load. Same 5/16-18 thread, so it drops into the same hole.
3) Do these Metallics Grade 8 bolts qualify for a Buy American or ARRA funded job?
No. The JG8HC13 is not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. If your project has domestic sourcing requirements written into the contract, these won't satisfy them.
4) What wrench or socket size fits these Grade 8 hex bolts?
Across-flats head width is 0.489 to 0.500 in., so a 1/2 in. socket or wrench is the size to grab.
5) How are these 5/16-18 Grade 8 bolts packaged, and what's the smallest quantity I can order?
They ship in a jar of 100, and 100 is the order minimum. Jar weight is 1783 g. Metallics lists other sizes and quantities in the G8HC and JG8HC series on request.
6) Will a zinc plated Grade 8 bolt hold up outdoors or in a damp mechanical room?
The bolt is medium carbon steel with a zinc finish, which handles indoor and sheltered service fine. Zinc plating is a sacrificial coating, not stainless, so in constant wetting, washdown, or coastal exposure it will eventually rust. For those spots use a hot dip galvanized or stainless fastener instead, accepting that stainless won't give you Grade 8 strength.
7) Can I use these Grade 8 hex bolts for hanging electrical and HVAC equipment?
Yes, that's a listed application: Metallics calls out electrical, plumbing, heating and air conditioning work for the G8HC and JG8HC series, alongside automotive and fleet use. One caution for overhead support, Grade 8 steel is hard and heat-treated, so it is less forgiving of shock and bending loads than a Grade 5 fastener in the same hole.
8) What steel is the Metallics JG8HC13 bolt made from?
Medium carbon steel to AISI 1021-1045, quench and temper heat treated to Rockwell C33-39. That hardness range is what gets it to the Grade 8 150,000 psi tensile minimum. Worth knowing if you're welding nearby or specifying for a corrosive service, since the hardness makes it more susceptible to hydrogen embrittlement than a lower grade bolt.
How fast can I get the Metallics JG8HC13 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 JG8HC13 come with a warranty?
Absolutely. The Metallics JG8HC13 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 JG8HC13?
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
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