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Bolts 7/8-9 x 3-3/4 G5 HXBT St-zn (Box 25)
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:
- C
- Buy American Compliant:
- C
- Division:
- Electrical H1
- Fastener Head Height:
- 35/64 in.
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 1.285 - 1.312 in.
- Fastener Height:
- 0.531 - 0.563
- Fastener Length:
- 3/3/04
- Fastener Width:
- 1.465 - 1.516
- Field Application:
- Electrical, Plumbing, Heating, Air Conditioning Industries
- Grade:
- 5
- Hardness:
- Rockwell C19-30
- 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:
- 25
- Order Minimum Uom Imperial:
- EA
- Outside Diameter:
- 0.8660 - 0.8750 IN
- Pack Type:
- Box
- Product Group:
- Fasteners
- Product Height:
- 6 in
- Product Length:
- 7.25 in
- Product Weight:
- 17.85 lbs
- Product Width:
- 6.25 in
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 105000 psi minimum
- Thread Per Inch:
- 9
- Thread Standard:
- ASME B18.2.1-2012
- Wrenching Height:
- 0.378
- 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 G5HC153 – Frequently Asked Questions
1) What thread does the Metallics G5HC153 hex bolt use, and will it take a standard 7/8 inch nut?
It is a 7/8-9 thread, meaning 9 threads per inch, which is the standard coarse pitch for 7/8 inch diameter. Measured shank outside diameter runs 0.8660 to 0.8750 inches. Thread form is made to ASME B18.2.1-2012, so any standard 7/8-9 UNC nut or tapped hole mates with it.
2) Is a grade 5 bolt strong enough for mounting a motor to a machine base?
Grade 5 is the common structural choice for that work, and this one is rated at 105,000 psi minimum tensile and 105,000 psi minimum yield, with hardness of Rockwell C19-30. The medium carbon steel is heat treated. Metallics lists mounting motors to machinery as the primary use, along with automotive and truck repair. If your drawing calls out grade 8, this will not substitute.
3) Will a zinc plated steel bolt hold up outdoors or in a damp mechanical room?
The G5HC153 is steel with a zinc plated finish. Zinc gives sacrificial corrosion protection suitable for indoor mechanical rooms, equipment rooms and sheltered exterior work. For continuous wet exposure, coastal sites, or anything submerged, specify hot dip galvanized or stainless instead.
4) How many bolts come in a box, and can I buy just a few?
They ship as a box of 25, and 25 each is the order minimum, so a partial box is not an option. Metallics notes other sizes and quantities are available by request if 25 of this length is not what the job needs.
5) Does this Metallics hex bolt qualify for Buy American or ARRA funded work?
Metallics flags the G5HC153 as both Buy American compliant and ARRA compliant. Country of origin is listed as multiple, so if your contract requires documented domestic origin on each shipment, request the origin paperwork for the lot you receive.
6) What grip length do I get from a 3-3/4 inch bolt like this, and will it reach through a thick base plate?
The G5HC153 is a 7/8-9 x 3-3/4 hex cap screw, so 3-3/4 inches is the shank length measured from under the head. Subtract your total stack of plate, washers and nut thickness from that to confirm you get full nut engagement. On a bolt this diameter the thread is normally partial, leaving an unthreaded shoulder near the head, so avoid landing the joint line in the thread run-out.
7) What steel is this grade 5 hex cap screw made from?
Material is carbon steel to AISI 1008-1026, heat treated, which is what puts it in the Rockwell C19-30 range and gets it to grade 5 strength. It is a cap screw rather than a rough through bolt, so the head and thread tolerances follow ASME B18.2.1-2012.
8) Are these bolts used for anything beyond electrical work?
Metallics lists the G5HC and JG5HC series for the electrical, plumbing, heating and air conditioning trades, and the bolt itself is commonly used to mount motors to machinery and in automotive and truck repair. Same fastener either way, it is just stocked through electrical supply.
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Does the Metallics G5HC153 come with a warranty?
Absolutely. The Metallics G5HC153 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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