Bolts 5/16-18 X 3/4 G5 Hxbt St-zn (Jar 100)
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
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- 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
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- 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:
- JR
- Outside Diameter:
- 0.3065 - 0.3125 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 3.6 in
- Product Length:
- 3 in
- Product Weight:
- 1111 g
- Product Width:
- 76.2 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 120000 psi minimum
- Thread Per Inch:
- 18
- 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 JG5HC42 – Frequently Asked Questions
1) What thread size and pitch is the Metallics JG5HC42 hex bolt?
It's a 5/16-18 hex bolt: 18 threads per inch, coarse thread, with a shank outside diameter of 0.3065 to 0.3125 inch. Length is 3/4 inch. It will thread into any standard 5/16-18 tapped hole or mate with a 5/16-18 hex nut.
2) Is a grade 5 bolt strong enough for mounting a motor to a machine base?
Grade 5 is the normal choice for that work, and this one is a medium carbon steel cap screw, heat treated, with 120,000 psi minimum tensile and 92,000 psi minimum yield, hardness Rockwell C25-34. Metallics lists motor mounting as the intended use, along with automotive and truck repair. If your drawing calls for grade 8, this is not a substitute.
3) Do these Metallics grade 5 bolts qualify for a Buy American or ARRA funded job?
No. Country of origin is multiple, and Metallics lists these as not Buy American compliant and not ARRA compliant. For a federally funded project with domestic sourcing requirements you'll need a documented domestic grade 5 fastener instead.
4) What wrench or socket size fits this 5/16-18 grade 5 hex bolt head?
Across the flats the hex head measures 0.489 to 0.500 inch, so a 1/2 inch wrench or socket is the right size. Head height is 13/64 inch, which matters if you're working in a shallow recess or under a bracket.
5) Can zinc plated grade 5 hex bolts be used outdoors or in a damp mechanical room?
The finish is zinc plating over steel, which handles indoor and sheltered damp conditions like mechanical and electrical rooms. It is not stainless. For direct weather exposure, wash-down, or coastal work, go to stainless or hot dip galvanized hardware instead.
6) How many bolts come in a jar of Metallics JG5HC42?
They ship 100 pieces in a jar, and the jar of 100 is the order minimum. Metallics notes other sizes and quantities are available by request, so if you need a different length or a bulk count it can be sourced in the same G5HC and JG5HC series.
7) Does the Metallics JG5HC42 hex bolt meet a recognized dimensional standard?
Head and thread dimensions follow ASME B18.2.1-2012, the standard for inch hex bolts and screws, and the steel is within AISI 1008 to 1026. That means the head will match the same socket and the thread will mate with any off the shelf 5/16-18 nut on the job.
8) Are these hex bolts used for electrical and HVAC work or just machinery?
Metallics targets them at the electrical, plumbing, heating and air conditioning trades, so they get used for hanging equipment, securing enclosures and mounting motors. The description calls out motor to machinery mounting plus automotive and truck repair.
How fast can I get the Metallics JG5HC42 delivered?
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Does the Metallics JG5HC42 come with a warranty?
Absolutely. The Metallics JG5HC42 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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