Metallics JG8HC39 Bolts 3/8-16...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$54.00
$5.79
Metallics JG8HC39 Bolts 3/8-16 x 4-1/2 G8 HXBT St-zn (Jar 50)

Metallics JG8HC39 Bolts 3/8-16 x 4-1/2 G8 HXBT St-zn (Jar 50)

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Model: JG8HC39
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$54.00
$5.79
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Bolts 3/8-16 x 4-1/2 G8 HXBT St-zn (Jar 50)

  • 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:
C
Buy American Compliant:
C
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:
4/1/02
Fastener Width:
0.620 - 0.650
Grade:
8
Hardness:
Rockwell C33-39
Language Code:
EN
Material Standard:
AISI 1021 - 1045
Order Minimum Imperial:
50
Order Minimum Uom Imperial:
CT
Outside Diameter:
0.3690 - 0.3750 IN
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
5.75 in
Product Length:
3.5 in
Product Weight:
1724 g
Product Width:
88.9 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 JG8HC39 – Frequently Asked Questions

1) Is the Metallics JG8HC39 hex bolt strong enough to replace a Grade 5 bolt in a high-load joint?
Yes. The JG8HC39 is a Grade 8 hex cap screw rated 150,000 psi minimum tensile and 130,000 psi minimum yield, so it carries more load than a Grade 5 of the same 3/8 inch diameter. It is medium carbon steel, heat treated to Rockwell C33-39. That is why these get specified in automotive and fleet work where Grade 5 will not hold.
2) What thread pitch and nut size does the 3/8 inch Metallics Grade 8 hex bolt take?
It runs 16 threads per inch, so it mates with any 3/8-16 nut or tapped hole. Across flats the head measures 0.551 to 0.562 inches, which takes a 9/16 inch wrench or socket. Shank diameter is 0.3690 to 0.3750 inches.
3) Does this Grade 8 bolt come plated, or will it rust on a trailer or outdoor bracket?
The JG8HC39 ships with a zinc finish over the steel, which gives it basic corrosion protection for general service. Zinc plating is a mild protective coating, not a marine or heavily exposed solution, so for constant weather or chemical exposure you would want a heavier coating or stainless fastener.
4) How many bolts come in a jar of Metallics JG8HC39, and can I order fewer?
They ship 50 to a jar, and 50 count is the order minimum, so the jar is the smallest buy. Other sizes and quantities in the G8HC and JG8HC series can be had by request.
5) Does the Metallics JG8HC39 bolt qualify for a Buy American or ARRA job?
The record flags it as both ARRA compliant and Buy American compliant, with country of origin listed as China. On federally funded work, confirm which standard your contract applies, since the two programs treat origin differently.
6) What steel is the Metallics Grade 8 hex cap screw made from?
Material standard is AISI 1021 to 1045 medium carbon steel, quenched and tempered to Rockwell C33-39. That is the normal composition and heat treat range behind a Grade 8 rating, and it means the bolt should not be welded or re-heated, which destroys the temper.
How fast can I get the Metallics JG8HC39 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 JG8HC39 come with a warranty?
Absolutely. The Metallics JG8HC39 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 JG8HC39?
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 JG8HC39 from ZenSupply?
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