Metallics JG8HC281 Bolts 3/8-2...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$54.77
$5.79
Metallics JG8HC281 Bolts 3/8-24 x 4 G8 HXBT St-zn (Jar 50)

Metallics JG8HC281 Bolts 3/8-24 x 4 G8 HXBT St-zn (Jar 50)

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Model: JG8HC281
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$54.77
$5.79
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Bolts 3/8-24 x 4 G8 HXBT St-zn (Jar 50)

  • 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:
4-Jan in.
Fastener Head Type:
Hex
Fastener Head Width:
0.551 - 0.562 in.
Fastener Height:
0.226 - 0.243
Fastener Length:
4
Fastener Width:
0.620 - 0.650
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:
0.3690 - 0.3750 IN
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
7.25 in
Product Length:
4.5 in
Product Weight:
3125 g
Product Width:
114.3 MM
Sub Division:
Electrical-E H2
Tensile Strength:
150000 psi minimum
Thread Per Inch:
24
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 JG8HC281 – Frequently Asked Questions

1) Is the Metallics JG8HC281 bolt a fine thread or coarse thread 3/8 bolt?
Fine thread. The JG8HC281 is a 3/8-24 hex bolt, 24 threads per inch, which is the UNF (fine) pitch for 3/8 inch diameter. Coarse 3/8-16 nuts will not thread onto it, so pair it with 3/8-24 fine thread nuts or a tapped 3/8-24 hole.
2) How strong is a Grade 8 hex bolt compared to Grade 5?
This Metallics hex bolt is Grade 8 with a 150,000 psi minimum tensile strength and 130,000 psi minimum yield, hardness Rockwell C33-39. Grade 5 tops out lower, which is why Grade 8 gets specified on automotive and fleet work where the joint load exceeds what a Grade 5 can carry. It is medium carbon steel, heat treated.
3) How thick a stack of material can a 4 inch long 3/8-24 bolt clamp?
Shank length is 4 inches measured under the head, so your total grip (all plies plus washers plus the nut thickness you need to engage) has to fit inside that 4 inches. Bolt diameter is 0.3690 to 0.3750 inches, so it drops through a standard 7/16 inch clearance hole.
4) Does this Metallics bolt meet Buy American and ARRA requirements for a public project?
Metallics lists the G8HC/JG8HC Grade 8 hex bolt as both Buy American compliant and ARRA compliant. Country of origin is shown as multiple, so if your contract requires a single named origin on the submittal, confirm the origin on the lot you receive.
5) How many bolts come in a jar of Metallics JG8HC281?
Fifty bolts per jar, and 50 each is the order minimum. Metallics notes other sizes and quantities are available on request.
6) Will the zinc finish on these Grade 8 bolts hold up outdoors?
The JG8HC281 is zinc plated steel, which handles indoor, equipment, and sheltered outdoor service. Zinc plating is a sacrificial coating, not a hot dip galvanize or stainless, so in direct weather, road salt, or wash-down exposure expect surface rust over time and plan accordingly.
7) What steel is used in these Grade 8 hex bolts?
Medium carbon steel to AISI 1021-1045, heat treated to Rockwell C33-39. That heat treatment is what gets it to Grade 8 strength, and it also means you should not weld or re-heat these bolts, since heat will take the temper out and drop the strength.
How fast can I get the Metallics JG8HC281 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 JG8HC281 come with a warranty?
Absolutely. The Metallics JG8HC281 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 JG8HC281?
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 JG8HC281 from ZenSupply?
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