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Bolts 5/16-24 x 3/4 G5 HXBT St-zn (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Features
- Used to mount motor to machinery. Also popular in automotive and truck repair
- 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:
- 13/64 in.
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.489 - 0.500 in.
- Fastener Height:
- 0.195 - 0.211
- Fastener Length:
- 4-Mar
- Fastener Width:
- 0.557 - 0.577
- Grade:
- 5
- Hardness:
- Rockwell C25-34
- Language Code:
- EN
- Material Standard:
- AISI 1008 - 1026
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Gr_5_Hex_Bolt_Dom_St-Zn.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Outside Diameter:
- 0.3065 - 0.3125 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 3.6 in
- Product Length:
- 3 in
- Product Weight:
- 1116 g
- Product Width:
- 76.2 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 120000 psi minimum
- Thread Per Inch:
- 24
- Thread Standard:
- ASME B18.2.1-2012
- Voltage Rating:
- Zinc Chromate
- Wrenching Height:
- 0.14
- Yield Strength:
- 92000 psi minimum
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- G5HC and JG5HC
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Bolt
- Product Material:
- Steel
Metallics JG5HCF42 – Frequently Asked Questions
1) Is the Metallics JG5HCF42 bolt coarse or fine thread?
Fine thread. At 24 threads per inch on a 5/16 inch diameter, this is 5/16-24 UNF, not the 5/16-18 coarse pitch. It will only thread into a 5/16-24 tapped hole or nut, so if the motor foot or bracket you are bolting into is tapped coarse, this bolt will cross-thread and you need a 5/16-18 instead.
2) How strong is a Grade 5 hex bolt like the JG5HCF42, and is it strong enough for mounting a motor?
Grade 5, heat treated medium carbon steel with 120,000 psi minimum tensile and 92,000 psi minimum yield, hardness Rockwell C25-34. That is the normal strength class for bolting motors to machinery and for automotive and truck repair work, which is what this cap screw is made for. If a drawing calls out Grade 8, substitute up; Grade 5 does not meet it.
3) What wrench or socket size fits the hex head on these 5/16-24 Grade 5 bolts?
The head measures 0.489 to 0.500 inch across the flats, so a 1/2 inch wrench or socket is the fit. Head height is 13/64 inch, which matters if you are working under a motor mount or in a shallow counterbore.
4) How many bolts come in a jar of the Metallics JG5HCF42?
100 pieces, packed in a jar, and 100 count is also the order minimum. The jar of 100 weighs 1116 g. Other sizes and quantities in the same series can be had by request.
5) Is zinc plating on these hex bolts good enough for outdoor or damp locations?
The finish is zinc, a zinc chromate plated steel bolt. That handles indoor industrial, shop, and vehicle service work and incidental moisture, but it is a sacrificial coating, not stainless or hot dip galvanized. For sustained outdoor exposure, wet wells, or coastal air, go to a stainless or hot dip galvanized fastener instead.
6) Will the JG5HCF42 fit through a 5/16 inch drilled hole?
Body diameter runs 0.3065 to 0.3125 inch, so it is right at nominal 5/16. A clean 5/16 inch drilled hole is a press fit at best; use a 11/32 or 3/8 inch clearance hole if the bolt has to pass through the part rather than thread into it.
7) Is this a hex bolt or a hex cap screw, and does it come with nuts or washers?
It is a hex head cap screw made from heat treated medium carbon steel, sold as bolts only. No nuts or washers are included, so order 5/16-24 fine thread nuts and the washers you need separately. Mismatched 5/16-18 nuts will not run on it.
8) Do these Metallics hex bolts meet a dimensional standard I can put on a submittal?
Thread and head dimensions conform to ASME B18.2.1-2012, and the steel falls in the AISI 1008-1026 range. The record also marks the item ARRA and Buy American compliant, with country of origin listed as multiple.
How fast can I get the Metallics JG5HCF42 delivered?
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Does the Metallics JG5HCF42 come with a warranty?
Absolutely. The Metallics JG5HCF42 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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