Description
Reviews
| Brand | - |
| Category | Root / Hardware & Tools |
| Origin | - |
| Material | Carbon Steel |
| Grade | 8.8 |
| Finish | Black Oxide (Blackened) |
| Head Style | Hex Socket with Integrated Flange |
| Drive Type | Allen/Hex Key |
| Thread Standard | Metric (ISO) |
| Available Sizes | M4, M5, M8, M10 |
| Feature | Integrated Washer for Load Distribution |
| Application | Automotive, Machinery, Structural Assembly |
| Corrosion Resistance | Moderate (Suitable for indoor/dry environments) |
Anonymous
Mar 29, 2026
Rating: 5/5
Exactly as described
Needed specific flange bolts for a motorcycle modification. These matched the specs perfectly and arrived quickly. Will buy again.
Anonymous
Mar 21, 2026
Rating: 4/5
Strong but watch the torque
Very strong 8.8 grade bolts. Just be careful not to over-torque them as the black finish can chip if you go too hard. Overall very satisfied.
Anonymous
Mar 20, 2026
Rating: 4/5
Good quality, fast shipping
Solid carbon steel construction. I used the M8 size for a shelving unit. One bolt had a slightly rough thread, but the rest were perfect.
Anonymous
Mar 12, 2026
Rating: 5/5
Great value for bulk purchase
Bought a mix of M4 and M5 for my electronics enclosure projects. They hold tight and the flange distributes pressure evenly without cracking the plastic.
Anonymous
Mar 10, 2026
Rating: 5/5
Perfect for automotive repairs
These bolts fit perfectly on my engine block. The integrated flange saves time since I don't need separate washers. The black finish looks great too.
Anonymous
Mar 02, 2026
Rating: 5/5
Excellent grip and finish
The hex socket is deep and well-machined, so my keys don't strip easily. The black oxide coating provides a nice professional look.
Q: Does the integrated washer rotate independently?
A: No, the flange is integrated directly into the bolt head and does not rotate independently. This design helps prevent loosening due to vibration compared to a separate washer.
Q: Are these bolts suitable for outdoor use in rainy conditions?
A: While the black oxide finish offers some protection, these are carbon steel and may rust if exposed to constant moisture. We recommend applying additional grease or using stainless steel alternatives for harsh outdoor environments.
Q: Can I use these on aluminum parts without causing galvanic corrosion?
A: Direct contact between carbon steel and aluminum can lead to galvanic corrosion. We suggest using a dielectric grease or an isolation washer between the bolt and the aluminum part to prevent this issue.
Q: What size Allen key do I need for the M10 bolt?
A: For the M10 Hex Socket Flange Bolt, you will typically need an 8mm Allen key. Please check the specific product packaging for confirmation as tolerances can vary slightly by manufacturer.
Q: Do you sell matching nuts for these bolts?
A: These are designed primarily for tapping into threaded holes. However, if you need nuts, standard metric hex nuts corresponding to the bolt size (M4, M5, M8, M10) will fit the threads correctly.
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