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Bolts 1/2-13 x 4 G8 HXBT St-zn (Jar 25)
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:
- N
- Buy American Compliant:
- No
- Country Of Origin:
- MUL
- 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:
- 25
- Order Minimum Uom Imperial:
- EA
- Outside Diameter:
- 0.2450 - 0.2500 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 2635 g
- Product Width:
- 114.3 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 150000 psi minimum
- Thread Per Inch:
- 13
- 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 JG8HC37 – Frequently Asked Questions
1) What thread does the Metallics JG8HC37 hex bolt take, and will a standard 1/2 inch nut fit it?
It's a 1/2-13 bolt, so 13 threads per inch, which is the standard UNC coarse pitch for 1/2 inch. Any 1/2-13 UNC nut or tapped hole will take it. Don't try to run it into a 1/2-20 fine thread nut.
2) How strong is a Grade 8 bolt compared to a Grade 5 for a heavy anchoring job?
The JG8HC37 is Grade 8 with a minimum tensile strength of 150,000 psi and minimum yield of 130,000 psi, hardness Rockwell C33-39. Grade 5 tops out lower, which is why Grade 8 gets specified in automotive and fleet work where the joint load is higher. It's medium carbon steel, heat treated, per AISI 1021-1045.
3) Do Metallics JG8HC37 bolts qualify for Buy American or ARRA funded projects?
No. These are not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. If you're on a federally funded job with domestic sourcing requirements, you need a domestically produced fastener instead.
4) How many bolts come in a jar of Metallics JG8HC37?
25 bolts per jar, and 25 each is the order minimum. Metallics notes other sizes and quantities are available by request.
5) Is the zinc plating on these Grade 8 bolts good enough for outdoor use?
Finish is zinc plating over steel. That handles indoor and sheltered conditions and gives decent corrosion resistance on exterior work, but it is not stainless. In wet, coastal, or chemically aggressive locations zinc plating will eventually give up, so a hot dip galvanized or stainless fastener is the better call there, accepting that neither will give you Grade 8 strength.
6) Can electrical and mechanical contractors use the Metallics JG8HC37 for strut, hangers, and equipment mounting?
Yes. Metallics lists the field application as the electrical, plumbing, heating and air conditioning industries, so this 1/2-13 x 4 Grade 8 hex bolt is the kind of fastener used for hanging and anchoring equipment and supports in those trades. The Grade 8 rating gives you headroom where a Grade 5 is marginal.
7) Are nuts and washers included with the Metallics JG8HC37 jar?
The jar contains 25 Grade 8 hex bolts only. Order matching 1/2-13 nuts and hardened washers separately; with a Grade 8 bolt you want a hardened washer under the nut so the higher clamp load doesn't dish into the material.
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Does the Metallics JG8HC37 come with a warranty?
Absolutely. The Metallics JG8HC37 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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