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Bolts 1/2-13 x 1-3/4 G8 HXBT St-zn (Jar 25)
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:
- Nov-64 in.
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.428 - 0.438 in.
- Fastener Height:
- 0.150 - 0.163
- Fastener Length:
- 1/3/04
- 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:
- 100
- Order Minimum Uom Imperial:
- CT
- 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:
- 5375 g
- Product Width:
- 114.3 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 150000 psi minimum
- Thread Per Inch:
- 13
- 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 JG8HC49 – Frequently Asked Questions
1) What thread does the Metallics JG8HC49 hex bolt take, and will a standard 1/2-13 nut fit it?
It's a 1/2-13 bolt, so 13 threads per inch on a 1/2 inch diameter, which is the standard UNC coarse thread for that size. Any standard 1/2-13 coarse nut or tapped hole will take it. Usable length is 1-3/4 inches under the hex head.
2) Is a Grade 8 bolt like this actually stronger than the Grade 5 I have on the shelf?
Yes, and by a meaningful margin. The JG8HC49 is a Grade 8 cap screw with 150,000 psi minimum tensile and 130,000 psi minimum yield, hardness Rockwell C33-39. Grade 5 tops out well below that, which is why this grade gets specified for automotive and fleet work where the joint load is higher than a Grade 5 will carry.
3) Will a zinc plated Grade 8 bolt hold up outdoors or does it need to stay dry?
The finish here is zinc plating over medium carbon steel, which is a light corrosion barrier for indoor, sheltered, or intermittently damp service. It is not stainless and it is not hot dip galvanized, so for constant weather exposure, salt spray, or wet chemical environments you want a different fastener. For equipment, machinery frames, and fleet repair work it's the normal choice.
4) How does the JG8HC49 come packaged and how many bolts do I get?
They ship in a jar of 25. That's the shop-counter pack, so it suits a service truck or a maintenance crib rather than a production line. Metallics lists other sizes and quantities as available by request if you need a different count or length.
5) Is this Metallics bolt Buy American and ARRA compliant for a government or public works job?
Metallics flags the G8HC/JG8HC Grade 8 hex bolts as both Buy American compliant and ARRA compliant, which is what an institutional or public-agency procurement file usually needs on the fastener line. Country of origin is listed as multiple, so confirm the origin documentation you need is included with the shipment for your specific contract.
6) What steel is the Metallics Grade 8 hex bolt made from?
Medium carbon steel in the AISI 1021 to 1045 range, heat treated to reach Grade 8 properties, then zinc plated. That heat treatment is what gets it to Rockwell C33-39. Practical note for fabricators: don't weld or reheat it, heat will draw the temper and you lose the grade.
How fast can I get the Metallics JG8HC49 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 JG8HC49 come with a warranty?
Absolutely. The Metallics JG8HC49 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 JG8HC49?
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installation tips, and troubleshooting. Contact Us
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