Metallics G8HC343 Bolts 3/4-10...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$57.16
$9.64
Metallics G8HC343 Bolts 3/4-10 X 3 G8 Hxbt St-zn (Box 25)

Metallics G8HC343 Bolts 3/4-10 X 3 G8 Hxbt St-zn (Box 25)

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Model: G8HC343
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$57.16
$9.64
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Bolts 3/4-10 X 3 G8 Hxbt St-zn (Box 25)

  • 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:
C
Buy American Compliant:
C
Division:
Electrical H1
Fastener Head Height:
2-Jan in.
Fastener Head Type:
Hex
Fastener Head Width:
1.100 - 1.125 in.
Fastener Height:
0.455 - 0.483
Fastener Length:
3
Fastener Width:
1.240 - 1.299
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:
25
Order Minimum Uom Imperial:
CT
Outside Diameter:
0.7410 - 0.7500 IN
Pack Type:
Box
Product Group:
Fasteners
Product Height:
3.25 in
Product Length:
7.25 in
Product Weight:
11.64 lbs
Product Width:
6.75 in
Sub Division:
Electrical-E H2
Tensile Strength:
150000 psi minimum
Thread Per Inch:
10
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 G8HC343 – Frequently Asked Questions

1) What thread size and pitch is the Metallics G8HC343 hex bolt, and will it take a standard 3/4-10 nut?
It's a 3/4-10 bolt: 3/4 inch nominal diameter with 10 threads per inch, which is standard UNC coarse thread. Any 3/4-10 coarse nut or tapped hole will take it. Measured shank outside diameter runs 0.7410 to 0.7500 inch. For a Grade 8 bolt you normally pair a Grade 8 (or higher) nut and hardened washers so the fastener, not the nut, is the limiting part.
2) Is a Grade 8 bolt actually stronger than Grade 5, and when do I need it?
Yes, and the numbers show the gap. This Grade 8 cap screw is rated 150,000 psi minimum tensile and 130,000 psi minimum yield, hardened to Rockwell C33-39. Grade 5 in the same size is substantially lower. Use Grade 8 where the joint sees high clamp load, shock, or vibration, which is why these get specified in automotive and fleet work. For general-purpose bracketry and light structural anchoring, Grade 5 is usually sufficient and more forgiving of overtorque.
3) Will a zinc plated Grade 8 bolt hold up outdoors?
The finish is zinc plating over medium carbon steel, which handles indoor, enclosed, and sheltered outdoor service. It is not a marine or continuously wet finish, and high strength zinc plated steel is also a hydrogen embrittlement and galvanic concern if you bolt it into aluminum or stainless. For direct weather exposure or coastal sites, specify a hot dip galvanized or stainless fastener instead.
4) How many bolts come in a box of the G8HC343, and can I buy fewer than a full box?
These ship 25 pieces to a box, and 25 is the order minimum, so a box is the smallest quantity. Other sizes and quantities in the G8HC and JG8HC series are available by request if 3/4-10 x 3 is not the length you need.
5) Does the Metallics G8HC343 meet Buy American or ARRA requirements on a public project?
The record flags this item as compliant for both ARRA and Buy American purposes. Country of origin is China. If your contract carries a strict domestic melt-and-manufacture clause rather than a general Buy American provision, confirm the origin works for your specification before you release it.
6) What steel is this Grade 8 hex bolt made from?
Medium carbon steel in the AISI 1021 to 1045 range, quenched and tempered to reach Grade 8 properties. That heat treatment is what gets it to Rockwell C33-39. Practical consequence: do not weld, torch cut, or re-heat these bolts, and do not re-use one that has been torqued to yield, because the heat treat is the strength.
7) How much does a box of 25 of these 3/4-10 x 3 Grade 8 bolts weigh?
A box runs 11.64 lbs, which matters if you're pulling several boxes onto a service truck or hand carrying them up to a roof. The carton measures 7.25 x 6.75 x 3.25 inches.
How fast can I get the Metallics G8HC343 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 G8HC343 come with a warranty?
Absolutely. The Metallics G8HC343 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 G8HC343?
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 G8HC343 from ZenSupply?
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