What are hexagon flange bolts, and how are they different from regular bolts?
Hexagon flange bolts, also known as hex flange screws or flanged hex head bolts, are a fastener widely used in various industries and construction projects. A hexagonal head with an integrated washer-like flange beneath it characterizes them. This flange serves multiple purposes, including providing a larger bearing surface to distribute load and pressure, acting as a built-in washer to reduce the risk of damage to the connected material, and serving as a means of easily guiding the bolt during installation.
Compared to regular bolts with separate washers, hexagon flange bolts offer added convenience and efficiency during assembly. The flange also acts as a stop, preventing the bolt from passing completely through a hole when tightened. This design feature is especially useful in situations where accessibility is limited. Hexagon Flange Bolts are prized for their reliability, ease of use, and enhanced load-bearing capabilities, making them popular in many critical applications.
Can hexagon flange bolts be used in high-temperature or corrosive environments, and what considerations should be taken for such applications?
Hexagon Flange Bolts can be used in high-temperature or corrosive environments, but careful consideration must be taken to ensure optimal performance and longevity. When exposed to extreme temperatures or corrosive substances, the choice of material becomes crucial. Stainless steel hexagon flange bolts are popular for their excellent corrosion resistance. They suit many environments, including those with high moisture or chemical exposure. Selecting bolts with suitable heat-resistant properties, such as those made from materials like alloy steel, can ensure their reliability in high-temperature applications.
Proper installation and maintenance practices are essential. Before use, it is vital to assess the specific environmental conditions the bolts will encounter and choose the appropriate grade and material accordingly. Regular inspections and maintenance routines should be established to detect any signs of corrosion or wear, ensuring prompt replacements when necessary. Protective coatings or lubricants can also defend against corrosion in harsh environments. Verifying the compatibility of the bolt material with the connected materials is crucial, as galvanic corrosion can occur when dissimilar metals come into contact.
| Metric Size | M10 to M100 |
|---|---|
| Imperial Size | 3/8 to 8" |
| Threads | UNC, UNF, ISO, BSW & ACME. |
| Standards | ASME, BS, DIN, ISO, UNI, DIN-EN |
| Diameter | M8 to M20 |
| Dimensional Standards | 20 mm to 200 mm |
| Length | B18.2.3.4M, ANSI B18.2.1 |
| Bolts Types | Hexagon Flange Bolts |
| Threads | METRIC, BSW, UNC, UNF, BSF or as required |
| Unified Thread Standard (UTS) | UNC, UNF, NPT, UNS, UNEF, NPTF |
| Application | Wind Tower, Nuclear Power, Railway, Automotive Industry, Construction, Electronic Industry |
| Bolts Packaging | Cartoon Box / Wooden Pallet / Wooden Box / Thread Protector |
| Bolts Forming | Hot Forged Bolts & Cold Forged Bolts |
| Certification | Dual Certified As per ASTM & ASME Codes |
DIN 6921 - Hexagon Flange Bolts Metric
| Thread | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | M20 | |
|---|---|---|---|---|---|---|---|---|---|
| size d | - | - | M8 x 1 | M10 x 1,25 | M12 x 1,5 | (M14x1,5) | M16 x 1,5 | M20 x 1,5 | |
| - | - | - | (M10 x 1) | (M10 x 1,25) | - | - | - | ||
| P | 0,8 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2 | 2,5 | |
| C | Min. | 1 | 1,1 | 1,2 | 1,5 | 1,8 | 2,1 | 2,4 | 3 |
| da | Min. | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
| Max. | 5,75 | 6,75 | 8,75 | 10,8 | 13 | 15,1 | 17,3 | 21,6 | |
| dc | Max. | 11,8 | 14,2 | 17,9 | 21,8 | 26 | 29,9 | 34,5 | 42,8 |
| dw | Min. | 9,8 | 12,2 | 15,8 | 19,6 | 23,8 | 27,6 | 31,9 | 39,9 |
| e | Min. | 8,79 | 11,05 | 14,38 | 16,64 | 20,03 | 23,36 | 26,75 | 32,95 |
| h | Max. | 6,2 | 7,3 | 9,4 | 11,4 | 13,8 | 15,9 | 18,3 | 22,4 |
| m | Min. | 4,7 | 5,7 | 7,6 | 9,6 | 11,6 | 13,3 | 15,3 | 18,9 |
| m´ | Min. | 2,2 | 3,1 | 4,5 | 5,5 | 6,7 | 7,8 | 9 | 11,1 |
| s | Nominal size = max. | 8 | 10 | 13 | 15 | 18 | 21 | 24 | 30 |
| Min. | 7,78 | 9,78 | 12,73 | 14,73 | 17,73 | 20,67 | 23,67 | 29,16 | |
| r | Max. | 0,3 | 0,36 | 0,48 | 0,6 | 0,72 | 0,88 | 0,96 | 1,2 |
| Thread d | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M 20 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| - | - | M8 x 1 | M10 x 1,25 | M12 x 1,5 | M14 x 1,5 | M16 x 1,5 | M20 x 1,5 | |||||||||||
| - | - | - | (M10 x 1) | (M12 x 1,25) | - | - | - | |||||||||||
| l | Shank lengtds | |||||||||||||||||
| nominal dimension | min. | max. | ls min. | lg max | ls min. | lg max | ls min. | lg max | ls min. | lg max | ls min. | lg max | ls min. | lg max | ls min. | lg max | ls min. | lg max |
| 10 | 9,71 | 10,29 | - | 2,4 | ||||||||||||||
| 12 | 11,65 | 12,35 | - | 2,4 | - | 3 | ||||||||||||
| 16 | 15,65 | 16,35 | - | 2,4 | - | 3 | - | 4 | ||||||||||
| 20 | 19,58 | 20,42 | - | 4 | - | 3 | - | 4 | - | 4,5 | ||||||||
| 25 | 24,58 | 25,42 | 5 | 9 | 2 | 7 | - | 4 | - | 4,5 | - | 5,3 | ||||||
| 30 | 29,58 | 30,42 | 10 | 14 | 7 | 12 | - | 8 | - | 4,5 | - | 5,3 | - | 6 | ||||
| 35 | 34,5 | 35,5 | 15 | 19 | 12 | 17 | 6,75 | 13 | - | 9 | - | 5,3 | - | 6 | - | 6 | ||
| 40 | 39,5 | 40,5 | 20 | 24 | 17 | 22 | 11,75 | 18 | 6,5 | 14 | - | 10 | - | 6 | - | 6 | - | 7,5 |
| 45 | 44,5 | 45,5 | 25 | 29 | 22 | 27 | 16,75 | 23 | 11,5 | 19 | 6,25 | 15 | - | 11 | - | 6 | - | 7,5 |
| 50 | 49,5 | 50,5 | 30 | 34 | 27 | 32 | 21,75 | 28 | 16,5 | 24 | 11,25 | 20 | 6 | 16 | - | 12 | - | 7,5 |
| 55 | 54,4 | 55,6 | 32 | 37 | 26,75 | 33 | 21,5 | 29 | 16,25 | 25 | 11 | 21 | 7 | 17 | - | 9 | ||
| 60 | 59,4 | 60,6 | 37 | 42 | 31,75 | 38 | 26,5 | 34 | 21,25 | 30 | 16 | 26 | 12 | 22 | - | 14 | ||
| 65 | 64,4 | 65,5 | 36,75 | 43 | 31,5 | 39 | 26,25 | 35 | 21 | 31 | 17 | 27 | 6,5 | 19 | ||||
| 70 | 69,4 | 70,6 | 41,75 | 48 | 36,5 | 44 | 31,25 | 40 | 26 | 36 | 22 | 32 | 11,5 | 24 | ||||
| 80 | 79,4 | 80,6 | 51,75 | 58 | 46,5 | 54 | 41,25 | 50 | 36 | 46 | 32 | 42 | 21,5 | 34 | ||||
| 90 | 89,3 | 90,7 | 56,5 | 64 | 51,25 | 60 | 46 | 56 | 42 | 52 | 31,5 | 44 | ||||||
| 100 | 99,3 | 100,7 | 66,5 | 74 | 61,25 | 70 | 56 | 66 | 52 | 62 | 41,5 | 54 | ||||||
| 110 | 109,3 | 110,7 | 71,25 | 80 | 66 | 76 | 62 | 72 | 51,5 | 54 | ||||||||
| 120 | 119,3 | 120,7 | 81,25 | 90 | 76 | 86 | 72 | 82 | 61,5 | 74 | ||||||||
| 130 | 129,2 | 130,8 | 80 | 90 | 76 | 86 | 65,5 | 78 | ||||||||||
| 140 | 139,2 | 140,8 | 90 | 100 | 86 | 96 | 75,5 | 88 | ||||||||||
| 150 | 149,2 | 150,8 | 96 | 106 | 85,5 | 98 | ||||||||||||
| 160 | 159,2 | 160,8 | 106 | 116 | 95,5 | 108 | ||||||||||||
| 180 | 179,2 | 180,8 | 115,5 | 128 | ||||||||||||||
| 200 | 199 | 201 | 135,5 | 148 | ||||||||||||||
Hexagon Flange Bolts in Distillery Plants
Hexagon Flange Bolts in Sugar Industries
Hexagon Flange Bolts in Process Industries
Hexagon Flange Bolts in Power Plants
Hexagon Flange Bolts in Refineries
Hexagon Flange Bolts in Petrochemical Plants
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