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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...
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$51.54
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Metallics JG8HC371 Bolts 1/2-20 x 4 G8 HXBT St-zn (Jar 25)
Model: MET-JG8HC371
Bolts 1/2-20 x 4 G8 HXBT St-zn (Jar 25)
Additional Notes
Other sizes and quantities available by request
Features
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Bolts 1/4-20 X 3-1/2 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:
- 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:
- 3/1/02
- Fastener Width:
- 0.484 - 0.505
- Grade:
- 8
- Hardness:
- Rockwell C33-39
- Language Code:
- EN
- Material Standard:
- AISI 1021 - 1045
- Order Minimum Imperial:
- 50
- Order Minimum Uom Imperial:
- CT
- 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:
- 1225 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 JG8HC73 – Frequently Asked Questions
1) Is the Metallics JG8HC73 a coarse thread 1/4-20 bolt, and will it take a standard 1/4-20 nut?
Yes. The JG8HC73 hex cap screw is 1/4 inch diameter at 20 threads per inch, which is the standard UNC coarse pitch for 1/4 inch fasteners, so it mates with any standard 1/4-20 nut or tapped hole. Shank diameter runs 0.2450 to 0.2500 inch.
2) How much stronger is a Grade 8 bolt than a Grade 5 for a high-load bracket?
The JG8HC73 is a Grade 8 fastener rated 150,000 psi minimum tensile and 130,000 psi minimum yield, hardness Rockwell C33-39. Grade 5 of the same diameter is rated 120,000 psi tensile, so Grade 8 gives you meaningfully more clamp load capacity in the same 1/4 inch hole. It is the usual choice in automotive and fleet work where Grade 5 will not carry the load.
3) What wrench or socket size fits the head on a 1/4-20 Grade 8 hex cap screw like the JG8HC73?
Head width across the flats measures 0.428 to 0.438 inch, so a 7/16 inch socket or wrench is the right fit. Across the corners the head runs 0.484 to 0.505 inch, which matters if you are working in a tight counterbore.
4) Is zinc plating on these Grade 8 bolts good enough for outdoor or truck-chassis use?
The finish is zinc on a steel body, which handles indoor, enclosed, and sheltered outdoor service and gives reasonable resistance to incidental moisture. For constant salt spray, washdown, or marine exposure, step up to hot dip galvanized or stainless. Note that stainless will not match Grade 8 strength.
5) Do these Metallics bolts meet Buy American or ARRA requirements for a government or institutional job?
Metallics lists the JG8HC73 as both ARRA compliant and Buy American compliant. Country of origin is China. If your specification requires domestic melt and manufacture rather than the broader Buy American provisions, confirm the exact clause in your contract before you submit it.
6) Can I get this Grade 8 hex bolt in a different length or a larger pack?
The JG8HC73 ships as 1/4-20 by 3-1/2 inch, 50 to a jar, and it is part of the Metallics G8HC and JG8HC series. Other sizes and quantities in that series are available by request, so if you need a shorter grip or bulk counts for a fleet shop, ask for the corresponding series number.
7) How many bolts come in the Metallics JG8HC73 jar?
Fifty pieces, packed in a jar, and 50 is also the order minimum by count. The jar weighs 1,225 g total, so figure roughly 24.5 g per bolt if you are estimating shipping or shelf loading.
8) What steel are these Metallics Grade 8 cap screws made from, and are they heat treated?
Medium carbon steel to AISI 1021-1045, quenched and tempered to Rockwell C33-39. That heat treatment is what gets the fastener to Grade 8 strength, and it also means you should not weld or re-heat these bolts, since doing so destroys the temper.
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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 JG8HC73 come with a warranty?
Absolutely. The Metallics JG8HC73 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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