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Bolts M8 x 16 HXBT St-zn (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Dimensional Standard:
- DIN 931
- Division:
- Electrical H1
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 12.73 - 13 in.
- Fastener Height:
- 5.15 - 5.45
- Fastener Length:
- 16mm
- Hardness:
- Rockwell C22-32
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Hd_Metric_Bolt_St-Zn.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 2.7 in
- Product Length:
- 3 in
- Product Weight:
- 966 g
- Product Width:
- 76.2 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 116000 psi minimum
- Yield Strength:
- 92800 psi minimum
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- MBHC and JMBHC
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Bolt
- Product Material:
- Steel
Metallics JMBHC81 – Frequently Asked Questions
1) What strength grade is the Metallics M8 x 16 zinc hex bolt, and will it hold for strut and channel work?
It runs 116,000 psi minimum tensile and 92,800 psi minimum yield, with a hardness of Rockwell C22-32. That puts it in medium carbon steel bolt territory, suitable for general electrical mounting, strut, enclosure and bracket work. It is not a high strength structural bolt, so do not substitute it where a structural connection is specified.
2) Will a 16mm long M8 bolt be long enough for my application?
At 16mm total length under the head, this bolt suits thin material: sheet steel enclosures, strut channel, mounting plates and brackets where the combined grip is only a few millimeters plus the nut or tapped hole depth. For stacked material or thicker flanges you will run out of thread. Measure your grip, add enough for full nut engagement, and step up in length if the total exceeds 16mm.
3) Are these bolts Buy American or ARRA compliant for a federal or public project?
The Metallics JMBHC81 carries a C flag for both ARRA and Buy American compliance in the product record, while country of origin is listed as China. On federally funded work, verify which specific provision your contract invokes against that origin before you commit the material, because domestic content rules differ by program.
4) Will an M8 bolt thread into a 5/16 inch tapped hole?
No. M8 is a metric thread and 5/16-18 is imperial. They are close in diameter, which is exactly how people cross thread and ruin a tapped hole. If your existing hardware is imperial, order 5/16 bolts, not this M8 x 16.
5) Can I use these M8 zinc plated bolts outdoors or in a damp mechanical room?
These are steel with a zinc finish. Zinc plating handles indoor and sheltered damp conditions fine, but it is a sacrificial coating, not stainless. For direct weather exposure, washdown areas, or anywhere near coastal salt, go stainless instead.
6) How many bolts come in a jar of Metallics JMBHC81, and can I buy fewer?
The JMBHC81 ships as a jar of 100 pieces, and 100 is the order minimum, so the jar is the smallest unit. Metallics also offers other sizes and quantities by request if 16mm length or the 100 count does not match the job.
7) What wrench or socket size fits the hex head on these Metallics M8 bolts?
It is a hex head bolt, and the stated head height is 5.15 to 5.45. For an M8 bolt built to DIN 931, the across flats dimension is 13mm, so a 13mm socket or wrench is what you want on the truck.
8) Do these Metallics bolts come with nuts and washers?
No. The JMBHC81 jar is bolts only, 100 pieces. Order M8 hex nuts and M8 flat or lock washers separately if the assembly needs them. In a tapped hole or threaded strut nut, the bolt alone does the job.
9) How much does a jar of 100 Metallics M8 x 16 bolts weigh and how big is the container?
A full jar runs 966 g. The container itself is listed at 3 in long, 2.7 in high and 76.2 mm wide, so it fits on a van shelf or in a gang box tray without repacking.
How fast can I get the Metallics JMBHC81 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics JMBHC81 come with a warranty?
Absolutely. The Metallics JMBHC81 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics JMBHC81?
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