Metallics JG8HC351 Bolts 1/2-2...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$55.29
$7.71
Metallics JG8HC351 Bolts 1/2-20 x 3 G8 HXBT St-zn (Jar 25)

Metallics JG8HC351 Bolts 1/2-20 x 3 G8 HXBT St-zn (Jar 25)

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Model: JG8HC351
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$55.29
$7.71
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Bolts 1/2-20 x 3 G8 HXBT St-zn (Jar 25)

  • 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:
C
Buy American Compliant:
C
Division:
Electrical H1
Fastener Head Height:
Nov-64 in.
Fastener Head Type:
Hex
Fastener Head Width:
0.428 - 0.438 in.
Fastener Height:
0.150 - 0.163
Fastener Length:
3
Fastener Width:
0.484 - 0.505
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:
25
Order Minimum Uom Imperial:
EA
Outside Diameter:
0.2450 - 0.2500 IN
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
7.25 in
Product Length:
4.5 in
Product Weight:
2232 g
Product Width:
114.3 MM
Sub Division:
Electrical-E H2
Tensile Strength:
150000 psi minimum
Thread Per Inch:
20
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 JG8HC351 – Frequently Asked Questions

1) Is the Metallics JG8HC351 bolt a coarse or fine thread, and what nuts will it take?
Fine thread. The JG8HC351 is a 1/2-20 hex bolt, meaning 20 threads per inch, so it mates with 1/2-20 UNF nuts and tapped 1/2-20 holes. It will not thread into a 1/2-13 coarse nut, which is the more common size on structural and general construction work, so check the nut or tapped hole before ordering.
2) How strong is a Grade 8 hex bolt compared to a Grade 5?
The JG8HC351 is a Grade 8 cap screw rated at 150,000 psi minimum tensile and 130,000 psi minimum yield, with a hardness of Rockwell C33-39. That is the step up you take when a Grade 5 does not carry the load, which is why these are common in automotive and fleet work. It is medium carbon steel, heat treated, per AISI 1021-1045.
3) How many bolts come in a jar of Metallics JG8HC351, and can I buy just a few?
These ship as a jar of 25, and 25 each is the order minimum, so the jar is the smallest buy. Jar weight is listed at 2,232 g.
4) Will a zinc plated Grade 8 bolt hold up outdoors or in a wash bay?
The finish is zinc plating over steel, which handles indoor and sheltered outdoor use and resists incidental moisture. For constant wet, salt spray, or washdown exposure, zinc plated carbon steel will eventually corrode; a stainless or hot dip galvanized fastener is the better call there, though neither matches Grade 8 strength.
5) Does the Metallics JG8HC351 bolt qualify for Buy American or ARRA funded projects?
Both flags come back compliant on this bolt: it is listed as ARRA compliant and Buy American compliant. Country of origin is recorded as multiple, so if your contract requires a single named country of manufacture, get documentation on the specific lot.
6) What wrench or socket size fits this 1/2-20 Grade 8 hex bolt?
Across the flats the hex head measures 0.484 to 0.505 inches wide, which puts it in the standard 3/4 inch socket range for a 1/2 inch diameter bolt head. Bring a 3/4 inch socket or wrench.
7) Is this a bolt or a cap screw, and can I use it in a tapped hole instead of with a nut?
Metallics calls the JG8HC351 a hex cap screw, which is the same part a lot of people call a hex bolt. With 1/2-20 threads it works either way, through a hole with a 1/2-20 nut or threaded directly into a tapped 1/2-20 hole, as long as your thread engagement is adequate for the load.
How fast can I get the Metallics JG8HC351 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 JG8HC351 come with a warranty?
Absolutely. The Metallics JG8HC351 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 JG8HC351?
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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