ThePipingMart Blog Fasteners What is Flange Bolt? Properties, Dimensions and Uses

What is Flange Bolt? Properties, Dimensions and Uses

What are Flange Bolt

If you work with mechanical engineering and are looking for a reliable fastening solution, flange bolts should be your go-to. Flange bolts are fasteners with an integrated washer-like flange head on one end and a threaded shaft on the other. This design provides superior strength and stability when attaching two components. Read on to learn more about the features of flange bolts and how they can benefit your projects.

Features and Benefits of Flange Bolts

Flange bolts come in various sizes, styles, and materials that allow you to customize their use for your specific needs. The most common type is the hex head flange bolt, which has a 6-sided head that makes it simple to attach with either an open-end wrench or a socket wrench. This flange bolt also features a little head, which reduces its profile while simultaneously providing maximum grip between the connected components.

Flanges offer superior strength to traditional nuts or washers because they evenly distribute the load across the entire surface area of the bolt’s head. This helps prevent slipping or loosening over time, making them ideal for applications where vibration or other factors might cause traditional fasteners to become loose or move out of alignment. Additionally, their unique design eliminates the need for separate washers or nuts, reducing assembly time and cost while increasing efficiency.

Lastly, because flanges are made from metal alloys like steel or stainless steel, they are highly resistant to corrosion and other wear and tear caused by exposure to moisture or extreme temperatures. This makes them an excellent choice for outdoor applications where regular maintenance is not possible or practical due to environmental conditions such as wind, rain, snow, etc.

Flange Bolt Uses

  • Flange bolts are commonly used in automotive and construction applications.
  • Flange bolts are used to secure two or more objects together.
  • Flange bolts have various uses, including attaching exhaust systems to vehicles and securing pipes.
  • Flange bolts are available in various sizes and material grades to meet the needs of different applications.
  • Flange bolts are typically made from carbon or stainless steel for strength and durability.

Flange Bolt Dimensions

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
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

Conclusion:

Flange bolts are a reliable fastening solution for all mechanical engineering projects due to their superior strength and stability to traditional nuts or washers. Their unique design eliminates the need for separate washers, which reduces assembly time and cost while increasing efficiency. Furthermore, their corrosion resistance makes them ideal for outdoor applications where regular maintenance is impossible due to environmental conditions like wind and rain. If you’re looking for an effective way to secure two components in any application, look no further than flange bolts!

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