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Metallics JG8HC768 Bolts 7/16 X 3/4 G8 Hxbt Y-Zn (Jar 100)
Model: MET-JG8HC768
Bolts 7/16 X 3/4 G8 Hxbt Y-Zn (Jar 100)
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...
Metallics
$51.47
$1.93
Bolts 1/4-20 X 5/8 G8 Hxbt Y-Zn (Jar 100)
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:
- Nov-64 in.
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.428 - 0.438 in.
- Fastener Height:
- 0.150 - 0.163
- Fastener Length:
- 8-May
- Fastener Width:
- 0.484 - 0.505
- 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:
- 0.2450 - 0.2500 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- 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 JG8HC18 – Frequently Asked Questions
1) Will a Metallics JG8HC18 bolt thread into a standard 1/4-20 nut or tapped hole?
Yes. The JG8HC18 is a 1/4-20 hex cap screw, cut 20 threads per inch with a shank outside diameter of 0.2450 to 0.2500 inch, so it mates with any standard 1/4-20 UNC nut, tapped hole, or threaded insert.
2) Is a Grade 8 bolt stronger than Grade 5, and when do I actually need it?
Grade 8 is the step up. The JG8HC18 is rated 150,000 psi minimum tensile and 130,000 psi minimum yield, versus the 120,000 psi tensile typical of a Grade 5 cap screw of this diameter. It is medium carbon steel, heat treated to Rockwell C33-39. Use it where the joint is carrying real load or vibration, equipment mounting, fleet and automotive work, suspension and drive components. For general bracket, strut, and enclosure work a Grade 5 or Grade 2 bolt is usually all the spec calls for and it costs less to stock.
3) Can I use the Metallics JG8HC18 on a federally funded or Buy American job?
No. The JG8HC18 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a job with domestic sourcing requirements you need a fastener certified as domestically made.
4) What size wrench or socket fits the head on this 1/4-20 Grade 8 hex bolt?
The hex head measures 0.428 to 0.438 inch across the flats, which is a 7/16 inch wrench or socket. Standard hex head, nothing proprietary about the drive.
5) What steel and coating is the Metallics JG8HC18 made from, and will it hold up outdoors?
Steel in the AISI 1021 to 1045 range with a zinc finish. Zinc plating handles indoor, sheltered, and light outdoor exposure, but it is a sacrificial coating, not stainless. For continuous wet service, coastal air, or chemical exposure, specify a hot dip galvanized or stainless fastener instead. Note that grade markings and strength ratings do not carry over to stainless, so check the load requirement before you substitute.
6) How are these Metallics Grade 8 hex bolts packaged, and what is the minimum I can buy?
They come in a jar of 100, and 100 count is the order minimum. The jar packaging is handy for a service truck or a shop bin since it reseals. Other sizes and quantities in the G8HC and JG8HC series can be had by request.
7) Do I need a Grade 8 nut and hardened washers with these bolts?
Yes, match the grade. A Grade 8 cap screw rated at 150,000 psi tensile will strip a lower grade nut before the bolt ever reaches its own capacity, so pair it with a Grade 8 (or Grade C) nut and hardened flat washers. The bolt is sold on its own, so nuts and washers are a separate line on the order.
How fast can I get the Metallics JG8HC18 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 JG8HC18 come with a warranty?
Absolutely. The Metallics JG8HC18 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 JG8HC18?
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 JG8HC18 from ZenSupply?
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every order.
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