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Bolts 5/8-11 X 2-1/2 G8 Hxbt St-zn (Jar 25)
Additional Notes
- Other sizes and quantities available by request
Features
- A cap screw made from medium carbon steel and heat-treated
- Used in automotive and fleet industries, where greater tensile strength is required than can be met by a Grade-5
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Division:
- Electrical H1
- Fastener Head Height:
- 27/64 in.
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.922 - 0.938 in.
- Fastener Height:
- 0.378 - 0.403
- Fastener Length:
- 2/1/02
- Fastener Width:
- 1.033 - 1.083
- Grade:
- 8
- Hardness:
- Rockwell C33-39
- Language Code:
- EN
- Material Standard:
- AISI 1021 - 1045
- Order Minimum Imperial:
- 25
- Order Minimum Uom Imperial:
- CT
- Outside Diameter:
- 0.6170 - 0.6250 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 5.75 in
- Product Length:
- 3.5 in
- Product Weight:
- 2690 g
- Product Width:
- 88.9 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 150000 psi minimum
- Thread Per Inch:
- 11
- 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 JG8HC58212 – Frequently Asked Questions
1) What nut do I need with the Metallics 5/8-11 Grade 8 hex bolt?
Thread is 5/8-11, meaning 11 threads per inch on a 5/8 inch coarse thread, so it takes a standard 5/8-11 UNC nut. Match the nut grade to the bolt: a Grade 8 bolt is normally paired with a Grade C or Grade 8 hex nut so the nut does not strip before the bolt reaches its rated load. Nuts and washers are not included in the jar.
2) Will the Metallics Grade 8 zinc bolts hold up outdoors?
Finish is zinc plating over steel, which handles indoor and sheltered industrial service and short-term weather exposure. It is not a marine or continuously wet finish; for that you want hot dip galvanized or stainless. Note too that zinc plating on a hardened Grade 8 bolt carries hydrogen embrittlement risk, which is why these are kept to mechanical rather than permanent outdoor structural duty.
3) How many bolts come in a jar of Metallics JG8HC58212?
25 pieces per jar, and 25 is the order minimum. The packed jar weighs 2690 g. The JG prefix on the part number is the jar pack; the same bolt in the G8HC series is the bulk equivalent.
4) What size hole should I drill for a 5/8-11 Grade 8 hex bolt?
Measured body diameter runs 0.6170 to 0.6250 inch, so a 11/16 inch clearance hole gives normal fit and 21/32 inch gives a close fit. Do not drill to nominal 5/8, the bolt will bind.
5) Are Metallics Grade 8 hex bolts Buy American compliant?
The record flags these as Buy American compliant and ARRA compliant, with country of origin China. If your contract has a domestic melt and manufacture requirement, verify against that specific clause before you submit the bolts for approval.
6) What steel are Metallics Grade 8 cap screws made from?
Medium carbon steel in the AISI 1021 to 1045 range, quenched and tempered to Rockwell C33-39. That heat treatment is what gets it to Grade 8 strength, and it is also why you should never weld or re-heat one of these bolts, it loses its rating.
How fast can I get the Metallics JG8HC58212 delivered?
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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 JG8HC58212 come with a warranty?
Absolutely. The Metallics JG8HC58212 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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