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Metallics JG8HC74 Bolts 1/4-20 x 4-1/2 G8 HXBT St-zn (Jar 50)
Model: MET-JG8HC74
Bolts 1/4-20 x 4-1/2 G8 HXBT St-zn (Jar 50)
Features
A cap screw made from medium carbon steel and heat-treated
Used in automotive and fleet industries, where greater tensile strength is required...
Metallics
$51.54
$1.93
Bolts 1/4-20 X 4 G8 Hxbt St-zn (Jar 50)
Additional Notes
- Other sizes and quantities available by request
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
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:
- 4
- Fastener Width:
- 0.484 - 0.505
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- 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:
- 50
- Order Minimum Uom Imperial:
- EA
- Outside Diameter:
- 0.2450 - 0.2500 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 5.75 in
- Product Length:
- 3.5 in
- Product Weight:
- 1338 g
- Product Width:
- 88.9 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 JG8HC8 – Frequently Asked Questions
1) What size and thread does the Metallics JG8HC8 hex bolt use, and will a standard 1/4-20 nut fit it?
It is a 1/4-20 bolt, 4 inches long, with 20 threads per inch (UNC coarse). Shank outside diameter runs 0.2450 to 0.2500 in. Any standard 1/4-20 coarse nut threads onto it, though with a Grade 8 bolt you normally pair a Grade 8 nut so the nut is not the weak point.
2) Why pick a Grade 8 hex bolt instead of a Grade 5 for strapping or strut work?
Grade 8 is the move when the joint sees higher tensile load than a Grade 5 can carry. The JG8HC8 is medium carbon steel, heat treated, with 150,000 psi minimum tensile and 130,000 psi minimum yield, hardness Rockwell C33-39. Grade 8 trades some ductility for that strength, so for general electrical, plumbing and HVAC hanging where loads are modest, a Grade 5 is usually enough. Use Grade 8 where the spec calls it out.
3) Do these Metallics Grade 8 bolts meet Buy American or ARRA requirements on a federal job?
No. The JG8HC8 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing requirements, you need a domestic-origin fastener instead.
4) What wrench or socket size fits the head on this 1/4-20 Grade 8 bolt?
Head width across flats measures 0.428 to 0.438 in., which is a 7/16 in. wrench or socket. It is a standard hex cap screw head.
5) Is zinc plating on these Grade 8 bolts good enough for outdoor or damp locations?
The finish is zinc over steel, which handles indoor and protected-exterior service. It is not a stainless or hot-dip galvanized bolt, so for continuous wet exposure, coastal air, or direct contact with treated lumber, specify a different corrosion finish.
6) How many bolts come in a jar of Metallics JG8HC8, and can I buy just a few?
They ship 50 to a jar, and 50 each is the order minimum, so the jar is the smallest buy. Jar packaging keeps them together on the truck and in the shop rather than loose in a bin. Other sizes and quantities in the G8HC/JG8HC line can be requested.
7) How much grip length do I get from a 4 inch 1/4-20 bolt?
Length is 4 inches measured under the head, which is the usable stack you can clamp less whatever the nut and washers take up. For a bolt this long the thread typically does not run the full shank, so confirm your material stack puts the nut on thread and not on the unthreaded body.
8) What steel are these Grade 8 hex bolts made from?
Medium carbon steel in the AISI 1021 to 1045 range, quenched and tempered to Grade 8 properties. That is what gets the bolt to Rockwell C33-39 hardness rather than relying on alloy content.
How fast can I get the Metallics JG8HC8 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 JG8HC8 come with a warranty?
Absolutely. The Metallics JG8HC8 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 JG8HC8?
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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