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Bolts 5/8-11 X 2-1/2 G5 Hxbt St-zn (Jar 50)
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:
- 25/64 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:
- 1.051 - 1.083
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Grade:
- 5
- Hardness:
- Rockwell C19-30
- Language Code:
- EN
- Material Standard:
- AISI 1008 - 1026
- Order Minimum Imperial:
- 50
- Order Minimum Uom Imperial:
- EA
- Outside Diameter:
- 0.6170 - 0.6250 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 6033 g
- Product Width:
- 114.3 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 105000 psi minimum
- Thread Per Inch:
- 11
- Thread Standard:
- ASME B18.2.1-2012
- Voltage Rating:
- Zinc Chromate
- Wrenching Height:
- 0.269
- Yield Strength:
- 105000 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 JG5HC66 – Frequently Asked Questions
1) What thread size and pitch is the Metallics JG5HC66 hex bolt?
The JG5HC66 is a 5/8-11 hex cap screw, meaning 5/8 inch nominal diameter with 11 threads per inch, which is standard UNC coarse thread for that diameter. Measured shank outside diameter runs 0.6170 to 0.6250 inch. Threads are made to ASME B18.2.1-2012, so it mates with any standard 5/8-11 UNC nut or tapped hole.
2) Is a Grade 5 bolt strong enough for mounting a motor to a machine base?
Yes, and that is the intended use for the Metallics G5HC/JG5HC hex cap screws. Grade 5 means medium carbon steel, heat treated, with 105,000 psi minimum tensile and yield strength and a hardness of Rockwell C19-30. That is the normal structural and equipment-mounting grade; step up to Grade 8 only if your drawing calls for it.
3) Can I use this Metallics hex bolt on a federally funded Buy American job?
No. The JG5HC66 hex cap screw is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. For a project with domestic sourcing requirements you need to spec a domestically produced Grade 5 fastener.
4) What wrench or socket size fits the head on this 5/8-11 Grade 5 hex bolt?
Head width across flats measures 0.922 to 0.938 inch, so a 15/16 inch socket or wrench is the fit. Head height is 25/64 inch, with 0.269 inch of wrenching height, which matters if you are driving it in a recessed pocket or up against a motor flange.
5) Will a zinc plated Grade 5 bolt hold up outdoors or in a wet mechanical room?
The JG5HC66 is steel with a zinc finish, which handles indoor mechanical rooms, motor bases and equipment frames well. Zinc plating is a sacrificial coating, not stainless, so for constant wet exposure, coastal air or chemical washdown you want hot dip galvanized or stainless hardware instead.
6) How many bolts come in a jar of Metallics JG5HC66, and can I buy just a few?
It ships as a jar of 50 pieces, and 50 each is the order minimum, so it is sold by the full jar rather than loose count. Metallics lists other sizes and quantities in the G5HC/JG5HC line on request.
7) How much grip length do I get from a 2-1/2 inch long 5/8-11 hex cap screw?
At 2-1/2 inches overall under the head, you have enough for roughly 2 inches of combined material and washer stack while leaving thread for a 5/8-11 nut with a couple of threads protruding. Add up your plate thicknesses, washers and nut height before choosing this length; if your stack is thicker, order a longer size from the same G5HC/JG5HC series.
8) Is this bolt sold through the electrical side, and is it appropriate for mechanical trades too?
The G5HC/JG5HC hex cap screws are stocked for the electrical, plumbing, heating and air conditioning trades, and the same bolt is widely used for motor and machinery mounting plus automotive and truck repair. It is a general purpose Grade 5 fastener, not an electrical-only part.
9) What steel is the Metallics Grade 5 hex cap screw made from?
Material is steel to AISI 1008-1026, heat treated to reach Grade 5 properties, with hardness at Rockwell C19-30. That is a medium carbon cap screw, so avoid welding on it and do not re-use one that has been torqued to yield.
How fast can I get the Metallics JG5HC66 delivered?
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Can I return it if it doesn’t work for me?
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Does the Metallics JG5HC66 come with a warranty?
Absolutely. The Metallics JG5HC66 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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