Metallics JG8HC12 Bolts 3/8-16...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$52.03
$1.93
Metallics JG8HC12 Bolts 3/8-16 x 2-3/4 G8 HXBT St-zn (Jar 100 )

Metallics JG8HC12 Bolts 3/8-16 x 2-3/4 G8 HXBT St-zn (Jar 100 )

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Model: JG8HC12
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$52.03
$1.93
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Bolts 3/8-16 x 2-3/4 G8 HXBT St-zn (Jar 100 )

  • 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
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:
2/3/04
Fastener Width:
0.620 - 0.650
Grade:
8
Hardness:
Rockwell C33-39
Language Code:
EN
Material Standard:
AISI 1021 - 1045
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
CT
Outside Diameter:
0.3690 - 0.3750 IN
Pack Type:
Jar
Product Group:
Fasteners
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 JG8HC12 – Frequently Asked Questions

1) Is the Metallics JG8HC12 a coarse thread 3/8 bolt, and will it take a standard 3/8-16 nut?
It is a coarse thread bolt: 3/8-16 x 2-3/4, with 16 threads per inch. That is the standard UNC pitch for a 3/8 inch diameter fastener, so it mates with any off the shelf 3/8-16 nut or tapped 3/8-16 hole. Shank diameter runs 0.3690 to 0.3750 inch, so it drops through a 7/16 inch clearance hole without reaming.
2) Why use a Grade 8 cap screw instead of a Grade 5 on a high load connection?
Grade 8 is where you go when Grade 5 will not carry the load. The JG8HC12 is a Grade 8 medium carbon steel cap screw, heat treated, with 150,000 psi minimum tensile and 130,000 psi minimum yield. Grade 5 tops out well below that. Typical use is automotive and fleet work where the joint needs the extra tensile capacity. On the flip side, Grade 8 is harder and less ductile, so it is not the right choice where you want the bolt to stretch rather than snap.
3) Do I have to use a Grade 8 nut with these 3/8-16 Grade 8 bolts?
Yes. A bolt rated to 150,000 psi minimum tensile only delivers that if the nut is rated to match, so pair it with a Grade 8 (or hardened Grade C) 3/8-16 nut. Putting a Grade 2 or Grade 5 nut on a Grade 8 bolt means the nut threads strip first and you never reach the bolt's capacity.
4) Are these zinc plated 3/8 Grade 8 bolts suitable for outdoor or wet locations?
The finish is zinc plating over a steel body, which handles indoor, dry, and sheltered conditions and gives moderate protection against incidental moisture. It is not a marine or continuously wet duty coating. For standing water, coastal exposure, or chemical washdown, specify stainless or hot dip galvanized instead, keeping in mind that stainless will not match Grade 8 strength.
5) Are Metallics JG8HC12 bolts Buy American or ARRA compliant for a federal job?
No. These Grade 8 hex cap screws are not Buy American compliant and are not ARRA compliant, with country of origin listed as multiple. If your project carries domestic sourcing requirements, these will not satisfy them.
6) How do Metallics JG8HC12 bolts come packaged and what is the minimum order?
They ship in a jar of 100, and 100 count is the order minimum, so this is a bin stock item rather than a loose piece pick. Other sizes and quantities can be had by request.
7) What steel and hardness are Metallics G8HC series hex cap screws made to?
Material is AISI 1021 to 1045 medium carbon steel, quench and temper hardened to Rockwell C33-39. That hardness band is what puts it in the Grade 8 class rather than Grade 5, and it is the spec to check against if an engineering drawing calls out a hardness range for the joint.
How fast can I get the Metallics JG8HC12 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 JG8HC12 come with a warranty?
Absolutely. The Metallics JG8HC12 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 JG8HC12?
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 JG8HC12 from ZenSupply?
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