Metallics JG8HC28 Bolts 3/8-16...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$52.46
$3.86
Metallics JG8HC28 Bolts 3/8-16 X 4 G8 Hxbt St-zn (Jar 50)

Metallics JG8HC28 Bolts 3/8-16 X 4 G8 Hxbt St-zn (Jar 50)

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Model: JG8HC28
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$52.46
$3.86
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Bolts 3/8-16 X 4 G8 Hxbt St-zn (Jar 50)

  • 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

  • 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:
4-Jan in.
Fastener Head Type:
Hex
Fastener Head Width:
0.551 - 0.562 in.
Fastener Height:
0.226 - 0.243
Fastener Length:
4
Fastener Width:
0.620 - 0.650
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:
50
Order Minimum Uom Imperial:
EA
Outside Diameter:
0.3690 - 0.3750 IN
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
7.25 in
Product Length:
4.5 in
Product Weight:
2994 g
Product Width:
114.3 MM
Sub Division:
Electrical-E H2
Tensile Strength:
150000 psi minimum
Thread Per Inch:
16
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 JG8HC28 – Frequently Asked Questions

1) What thread size and pitch is the Metallics JG8HC28 hex bolt, and will it take a standard 3/8-16 nut?
It's a 3/8 inch diameter bolt with 16 threads per inch, so it mates with any standard 3/8-16 nut or tapped 3/8-16 hole. Measured shank diameter runs 0.3690 to 0.3750 inch. Note that 16 TPI is the UNC coarse pitch for 3/8 inch fasteners, so a 3/8-24 fine-thread nut will not thread on.
2) Can I use these Grade 8 hex bolts on a federally funded or Buy American job?
No. The JG8HC28 is not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. If your contract carries a domestic sourcing clause, this bolt won't satisfy it and you'll need a documented US-made fastener instead.
3) Is a zinc plated Grade 8 bolt OK for outdoor or damp locations?
The finish is zinc over steel, which handles indoor, damp interior, and sheltered exterior service. It is not stainless. For direct weather exposure, coastal air, or anywhere chemically aggressive, zinc plating will eventually sacrifice and the steel underneath will rust, so a hot dip galvanized or stainless fastener is the right choice there.
4) How many bolts come in a jar of Metallics JG8HC28?
They ship 50 pieces to a jar, and 50 each is the order minimum. The jar packaging keeps a single size together on the truck or the shop shelf rather than loose in a bin, which is why it's a common MRO and fleet stocking item.
5) Do nuts and washers come with the JG8HC28 Grade 8 hex bolts?
No. The jar contains bolts only, 50 of them. You'll need to order 3/8-16 nuts separately, and for a Grade 8 bolt pair it with a hardened washer so the higher clamp load doesn't dish into the material. Other sizes and quantities in this series are available by request.
6) Are Grade 8 bolts appropriate for electrical and mechanical trade work, or only automotive?
Both. The series is called out for electrical, plumbing, heating and air conditioning work as well as automotive and fleet use, where a Grade 5 doesn't give enough tensile strength. Typical trade applications for a 3/8-16 by 4 inch Grade 8 are heavy equipment mounts, strut and trapeze hanger connections, and machine base anchoring.
How fast can I get the Metallics JG8HC28 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 JG8HC28 come with a warranty?
Absolutely. The Metallics JG8HC28 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 JG8HC28?
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 JG8HC28 from ZenSupply?
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