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.
Custom Travertine Stone Signage with Natural Marble 3D Lettering and Spherical Characters for Cafes, Clothing Stores, and Studios
$170.00
CANDLE.LAB | Realistic Cookie Series DIY Aromatherapy Plaster Candle Diffuser Handmade Silicone Mold
$12.00
Zhao Mengfu Calligraphy Copybook - Running Script 'Qingyun Zhi', Red-Traced Practice Paper for Beginners in Calligraphy
$15.80
Aesthetic Street Scene Watercolor Line Art for Coloring, 16K Landscape Watercolor Coloring Book, Painting Book, Cotton Pulp Watercolor Album
$15.80
Warehouse Nitrogen Sealing Generator - High-Purity Food-Grade PSA Skid-Mounted Container Equipment
$959.00
Ransheng UV Resin Gel, UV Crystal Glue for Gemstones, Ear Cuff Sealing, Dried Flower Molds, DIY Quick-Dry UV Epoxy
$44.00
Dairy Processing Production Line, Pasteurized Milk Equipment, Low-Temperature Sterilization and Fermentation Machine for Cow and Camel Milk
$8,203.00
Blue Lint-Free Wiping Paper - Industrial Large Roll Oil-Absorbent Shop Towels
$62.00
Green-Red AB Glue 5-Minute Fast-Drying Acrylate AB Glue for Glass Ceramic Metal Structural Adhesive Quick Set
$18.13
![Northern Wei Dynasty Inscriptions: Twenty Pieces from Longmen [Rubbing] - Original Size Wei Bei Calligraphy Copybook from Luoyang Longmen Grottoes](https://www.gosteppe.com/cache/small/product/270189/legacy-main-0c626807b3c375d4d5d6a89b.webp)
Northern Wei Dynasty Inscriptions: Twenty Pieces from Longmen [Rubbing] - Original Size Wei Bei Calligraphy Copybook from Luoyang Longmen Grottoes
$40.30
Ru Kiln Celadon Ceramic Brush Washer Set - Large, Medium, and Small Ink Dishes for Chinese Calligraphy and Painting Supplies
$88.80
Multi-Layer Over-Toilet Storage Rack for Bathroom, Laundry Room, and Balcony - Floor Standing Organizer
$44.96
Wrought Iron Solid Stainless Steel Letters – Minimalist Space Signage, Custom Metal Advertising Letters for Storefronts & Feature Walls
$10.00
Shimoyama 304 Stainless Steel Telescopic Rod - Kitchen Sink Cutting Board Support Rack for Dish Drying and Cloth Hanging
$74.80
Modified Wheel Lug Nuts Forged Steel High Strength for Lafesta Regal CT4 Civic Accord Crown Mazda3
$209.00
Milk Separator Machine - Electric Cream Skimmer and Butter Churn for Home and Commercial Use (Cow and Goat Milk)
$946.00
Three-Phase Auto-Reclosing Leakage Circuit Breaker - Smart Phase Loss, Undervoltage, Overload Protection with 485 Communication for PV Grid Connection
$693.20
Multi-Function Vegetable Cutter Commercial Electric for Cafeterias Fully Automatic Chili Scallion Chopper Imitation Hand-Cut Leek Machine
$1,600.00
Zhengtong ZT30 Fog Cannon - Micron-Level Humidification & Cooling Spray System for Steel Mills
$6,000.00
100Pcs Custom Clothing Hang Tags Personalized Plastic Securi
$125.94
Wall-Mounted Bathroom Storage Shelf, No-Drill Organizer for Sink, Shower, and Toilet Area
$5.76
Thickened 5mm Wool Felt Mat for Calligraphy Practice - Premium Writing Pad for Students and Beginners, Part of Four Treasures of the Study Set
$2.80
Multi-Function Car Tire Stone Removal Tool with Hook for Picking Out Rocks
$4.06
Label Stripping Machine – Semi-Automatic Unit for Beer, Baijiu, and Glass Bottle Label Removal; Custom Manufacturing Available
$19,980.00
High-Strength Manganese Steel Lifting Chain 6*18mm G80 Wear-Resistant Towing Chain
$84.34
Touchmark Acrylic Markers for Elementary Art, Washable Watercolor Pens for Kids' Drawing and Painting
$10.80
Official Flagship Store Steel Tongue Drum, C Key, 6-inch, 11 Notes, Carbon Steel Performance Grade Instrument for Kids and Students
$41.10
Outdoor Waterproof Backpack Camouflage Dry Bag with Wet/Dry Separation for Swimming, Rafting, and Trekking
$8.42
![[Save $50 on Order] Bundle: 5 Notebooks + 2 Pens + 20 Refills + 2 Grip Correctors](https://www.gosteppe.com/cache/small/product/270170/legacy-main-59be8c850af1ec303ad4901b.webp)
[Save $50 on Order] Bundle: 5 Notebooks + 2 Pens + 20 Refills + 2 Grip Correctors
$39.90
Sketching Tool Set for Art Students - Includes Blending Stumps, Tortillons, Paper Stumps, Sponge Balls, Cotton Swabs, Highlight Pens, Gray Tone Tools, Insert Knives, Smudging Knives, Scrapers, and Blending Cotton
$7.65
![[Yugan Member Bulk Pack] Official Authentic Flagship Store Multiple Options Exclusive Medical Hyaluronic Acid Condoms](https://www.gosteppe.com/cache/medium/product/278183/legacy-main-c19ff6b8c4e5a8efea786d28.webp)
![[Black Gold 001 3-in-1] Durex Condoms Official Flagship Store; Ultra-Thin Authentic Safety Sets Bulk Pack](https://www.gosteppe.com/cache/medium/product/275389/legacy-main-7400ceae4a3df34eb3abed82.png)
