Best flange bolts in 2026

flange bolts
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Selecting the right flange bolts requires balancing strength, corrosion resistance, and value. This curated list highlights top-rated metric bolt kits for automotive and home use. We prioritized grade ratings, material quality, and comprehensive assortment sizes to ensure you find durable fasteners that fit your specific mechanical needs without overspending on unnecessary extras.
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Besitu 280Pcs Metric Flange Bolt Assortment, M6x1.0, M8x1.25, M10x1.5 (12mm to 30mm) Assorted Hex Bolts and Nuts Washers Kit for Automotive, 10.9 Black Zinc Galvanized

Besitu 280Pcs Metric Flange Bolt Assortment, M6x1....

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Besitu - Besitu 280Pcs Metric Flange Bolt Assortment, M6x1.0, M8x1.25, M10x1.5 (12mm to 30mm) Assorted Hex Bolts and Nuts Washers Kit for Automotive, 10.9 Black Zinc Galvanized
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  • 【Metric Flange Bolt Assortment】This is nice selection of metric flange head bolts of the most common lengths along with the nuts and washers, Including M6-1.0 x 12/16/20/25/30mm, M8-1.25 x 16/20/25/30mm, M10-1.5 x30mm, 280pcs in total. The fully threaded design ensures a secure and stable fit in a wide range of applications.
  • 【10.9 Alloy and Black Galvanized】This flange bolt kit is crafted from 10.9 grade alloy steel with a durable black galvanized finish. If you're working inside the engine, you'll need high-strength Class 10.9 bolts on hand. Class 8.8 bolts are not rated for high-torque conditions.
C$32.99
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YIIFLY - YIIFLY M10 x 60mm Flanged Hex Head Bolts Flange Hexagon Screws, M10x1.5 Bolt, 10.9 Grade Alloy Steel, Hexagon Head Bolts, Black Oxide Finish, Half Thread, Quantity 6
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  • M10x1.5 Flanged Hex Head Bolts Flange Hexagon Screws , Serrations help grip the material surface for easy installation and provide mild vibration resistance.
  • Metric M10 Bolts ,Thread Diameter: 10 mm; Thread Length: 60 mm; Pitch Size: 1.5 mm.
C$17.88
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YEEZET - YEEZET 245PCS Grade 8.8 M6 M8 M10 Heavy Duty Flanged Bolts and Nuts Kit, Metric Flanged Hex Screws Nuts Includes 15 Most Common Sizes
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  • 🚩【MATERIAL】Made of 8.8 grade alloy steel, these screws provide reliable wear resistance, hardness and strength for everyday use. Please note: For best performance, avoid using them outdoors or in damp environments, as this may affect their durability over time.
  • 🚩【SPECIFICATION】This set follows the standard metric system, including flanged hex bolts and flanged nuts in 15 commonly used sizes: M6x16mm,M6x20mm,M6x25mm,M6x30mm,M6x35mm,M8x20mm,M8x25mm,M8x30mm,M8x35mm,M8x40mm,M10x30mm,M10x35mm,M10x40mm,M10x45mm,M10x50mm, , flange bolts have a flange on the bottom of the head that distributes the load like a washer. amounting to 245 pieces (M6*1.0mm、M8*1.25mm、M10*1.5mm).
C$79.73
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Riyhch - 240PCS Grade 8.8 M5 M6 M8 Flanged Bolts Nuts Screws Kit, Flanged Hex Screws Nuts Kit, 14 Sizes Stainless Steel 304 Metric Flange Metric Bolt Assortment （Golden）
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  • 【Specification】Flanged hex screws nuts kit Including 14 Sizes M5x10mm, M5x16mm, M5x20mm, M5x25mm, M5x30mm, M6x12mm, M6x16mm, M6x20mm, M6x25mm, M6x30mm, M8x20mm, M8x25mm, M8x30mm, M8x35mm
  • 【Material】Flange metric bolt assortment is made of 304 stainless steel, which is rust-proof, moisture-proof, anti-oxidation, corrosion-resistant, high hardness, sturdy
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Riyhch - 240PCS M5 M6 M8 Flanged Bolts Nuts Screws Kit, Hex Screws Nuts Kit, 14 Sizes Stainless Steel 304 Metric Flange Metric Bolt Assortment(M5 M6 M8)
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  • 【Specification】Flanged hex screws nuts kit Including 14 Sizes M5x10mm, M5x16mm, M5x20mm, M5x25mm, M5x30mm, M6x12mm, M6x16mm, M6x20mm, M6x25mm, M6x30mm, M8x20mm, M8x25mm, M8x30mm, M8x35mm
  • 【Material】M5 M6 M8 Bolt Flange metric bolt assortment is made of 304 stainless steel, which is rust-proof, moisture-proof, anti-oxidation, corrosion-resistant, high hardness, sturdy
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Homwin - Homwin 286Pcs Flange Metric Bolt Assortment, M6-1.0, M8-1.25, M10-1.5 (12mm to 30mm) Assorted Metric Bolts and Nuts Kit, Zinc Galvanized Black
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  • 【Metric Bolt Assortment Kit】286Pcs Flange Hex Bolts, Pitch; m6 x 1.0 bolt, m8 x 1.25 bolt, m10 x 1.5 bolt, 10 Sizes, Including M6-1.0 x 12/16/20/25/30mm, M8-1.25 x 16/20/25/30mm, M10-1.5 x30mm. The fully threaded design ensures a secure and stable fit in a wide range of applications.
  • 【10.9 Grade Alloy Steel and Black Galvanized】This metric bolt assortment is made of 10.9 grade alloy steel with a durable black galvanized finish. If you're working inside the engine, you'll need high-strength Class 10.9 bolts on hand.
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YEEZET - YEEZET 240PCS M5 M6 M8 Flanged Bolts and Nuts Kit,Stainless Steel 304 Metric Flanged Hex Screws Nuts Includes 14 Most Common Sizes
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  • 🚩【MATERIAL】Made of premium 304 stainless steel, which has high hardness, anti-rust, anti-corrosion, oxidation resistance and durability. Stainless steel hex nuts and bolts can work well in humid, high-temperature, and harsh environments.
  • 🚩【SPECIFICATION】This set follows the standard metric system, including flanged hex bolts and flanged nuts in 14 commonly used sizes: M5x10mm,M5x16mm,M5x20mm,M5x25mm,M5x30mm,M6x12mm,M6x16mm,M6x20mm,M6x25mm,M6x30mm,M8x20mm,M8x25mm,M8x30mm,M8x35mm, flange bolts have a flange on the bottom of the head that distributes the load like a washer. There are 120 complete sets in total, amounting to 240pieces (M5*0.8mm,M6*1.0mm,M8*1.25mm) .
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MYWISH - MYWISH - 830Pcs M6 M8 M10 Metric Flange Screw Assortment, Flanged Hex Head M6x1.0 M8x1.25 Bolt M10x1.5 Bolt Kit, Nuts and Bolts Stainless Steel 304 Serrated Bolts
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  • 【PRODUCT NAME】M6 M8 M10 assorted metric bolt and nut assortment, machine bolt assortment kit nuts and bolts set with m6 bolts, m8 screws, m10 screws, flange nuts and matching washers, multiple sizes and precise threads for different uses. Screw M6x1.0x16mm/20mm/25mm/30mm M8x1.25 x Screw
  • 【MATERIAL】304 stainless steel hex bolts, nut and bolt assortment sets. Mywish M6 M8 M10 screws have been rigorously tested, better anti-rust and corrosion performance effect in different extreme environments. M6 M8 M10 Bolt and Nuts Set has strong solid structure and long lasting bolts and
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TUYOMEII - Bolts for Exhaust，Exhaust Flange Bolts，Exhaust Manifold Bolt Kit， Flanged Hex Head Bolts, Stainless Steel Exhaust Flange Nuts and Bolts，M10X1.5-35mm 6-Pack
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  • 【Size】- Thread Diameter 10 mm, Thread Size 1.5 mm (M10), Screw Length 35 mm.
  • 【Exhaust Bolts And Nuts】- Aftermarket 03423 Exhaust Manifold Hardware Kit. The bolt kits are ideal for securing exhaust components and eliminating exhaust leaks. Fits some Toyota, BWM, Lexus,models.
C$17.18
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Taiss - Taiss 400PCS Metric Flange Bolt Assortment kit,M6x1.0 Bolt, M8x1.25 Bolt, M10x1.5 Bolt (12mm to 45mm) 10.9 Black zinc Plating Hex Metric Bolts and Nuts Washers,Metric Bolt Assortment
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  • Exquisite hand-held box packaging:Metric bolts are packed in exquisite hand-held boxes, which are easy to carry and store. Bolts are classified and placed in separate compartments with labels. It is convenient to use.
  • The flange bolt kit is made of 10.9 grade alloy steel, and the surface is plated with black zinc. Rust-proof, strong and high strength.
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Our Expert Verdict: flange bolts

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This list balances high-strength alloy options with corrosion-resistant stainless steel kits. For most users, a Grade 8.8 zinc kit offers the best balance of price and performance, while stainless is essential for outdoor durability.

Market Overview: flange bolts

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The market favors comprehensive metric assortments that save time on sorting. Consumers increasingly prefer stainless steel options for longevity, though zinc-plated kits remain popular for their cost-effective strength in dry or protected environments.

Buying Guide: flange bolts

AI
When buying flange bolts, check the grade rating for strength and the material for corrosion resistance. Ensure the kit includes the correct metric thread pitches and lengths for your specific application, whether it is automotive repair or general home maintenance.

Selection Criteria

We selected these kits based on verified customer ratings, material grade transparency (8.8 vs 10.9), and value per piece. We prioritized brands offering comprehensive assortments with reliable zinc or stainless steel finishes.

Budget Advice

AI
Entry-level zinc-plated kits offer the best value for general repairs. Mid-range stainless options provide better longevity. Premium large assortments justify their higher cost through sheer volume and variety, reducing the need for multiple purchases.

Conclusion: flange bolts

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Choosing the correct hardware prevents costly failures. Review our detailed comparisons to find the perfect fit for your project. Click through to read full reviews and specifications for each recommended kit to make an informed purchasing decision today.

Frequently Asked Questions

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Grade 10.9 bolts are made from higher-strength alloy steel and offer greater tensile strength than Grade 8.8 bolts. Grade 8.8 is sufficient for most general automotive and home applications, while Grade 10.9 is recommended for high-stress environments like exhaust systems or heavy machinery.
Stainless steel (like 304) offers superior corrosion resistance and is ideal for outdoor or marine environments. Zinc-plated carbon steel provides high strength and moderate rust resistance but may corrode faster in wet conditions. Choose stainless for durability in harsh weather and zinc-plated for general mechanical strength.
Measure the total thickness of the materials you are joining and add the bolt's grip length. Ensure the thread pitch (e.g., M6x1.0, M8x1.25) matches your existing hardware or tapped holes. Using the wrong pitch can strip threads or prevent proper seating.

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Why Trust This List?

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Independent Analysis

Objective criteria: rating, price, popularity

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Besitu 280Pcs Metric Flange Bolt Assortment, M6x1.0, M8x1.25, M10x1.5 (12mm to 30mm) Assorted Hex Bolts and Nuts Washers Kit for Automotive, 10.9 Black Zinc Galvanized
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Besitu 280Pcs Metric Flange Bolt Assortm...

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