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DIN 261 T Bolts
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DIN 261 T Bolts

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Product Description

DIN 261 Hammerhead Tee-Head Bolts with Round Neck

Leader-Fastener® DIN 261 T Bolts, also knows as Hammer Head Bolts, T-Slot Bolts and Tank Strap Bolts, have either a Tee or square shaped head. Normally they are are installed into a hole with a tee shaped slot so that the head of the bolt can sit flush, and the shape of the bolt resists turning while tightening.

T-slot bolts, as the name suggests, are bolts used in conjunction with T-slots, also known as T-bolts. T-bolts, called hammer bolts in European standards, are made of carbon steel and stainless steel. It can be directly put into the aluminum profile groove, and it can be automatically positioned and locked during the installation process. It is often used in conjunction with the flange nut. It is a standard matching connector when installing corner fittings. It can be customized according to the profile groove width and different series of profiles. Choose to use. T-bolts are movable anchor bolts and are tools that can be used with nuts. It has extremely important uses. It can not only be used as a connection button for certain pipes, but also plays an important role in the installation and connection of certain instruments, and also has extremely important applications in industry. T-bolts are typically used for nuts that mate with T-slots. General Finish: Zinc-plated or nickel-plated or blackened.


Leader-Fastener® DIN 261 - 2010 T-head bolts with hole


Screw Thread d M8 M10 M12 M16 M20 M24 M30 M36
P Pitch 1.25 1.5 1.75 2 2.5 3 3.5 4
b L≤120 22 26 30 38 46 54 66 78
120<L≤200 - - - 44 52 60 72 84
L>200 - - - 57 65 73 85 97
d0 - - - - - - - M12
ds max 8.58 10.58 12.7 16.7 20.84 24.84 30.84 37
min 7.42 9.42 11.3 15.3 19.16 23.16 29.16 35
k Nominal Size 5.5 7 8 10.5 13 15 19 23
max 5.9 7.5 8.75 11.4 13.9 15.9 20 24
min 5.1 6.5 7.25 9.6 12.1 14.1 18 22
s max 8.75 10.75 12.9 16.9 21 25 31 37.25
min 7.25 9.25 11.1 15.1 19 23 29 34.75
s1 Nominal Size 18 21 26 30 36 43 54 66
max 18.9 22 27 31 37.25 44.25 55.5 67.5
min 17.1 20 25 29 35.75 41.75 52.5 64.5
t min - - - - - - - 22
Weight of per 1000 steel products(≈kg) - - - - - - - -
Length of Thread b - - - - - - - -


Screw Thread d M42 M48 M56 M64 M72 M80 M90 M100
P Pitch 4.5 5 5.5 6 6 6 6 6
b L≤120 90 - - - - - - -
120<L≤200 96 108 124 130 - - - -
L>200 109 121 137 143 169 185 205 225
d0 M12 M12 M16 M16 M16 M20 M20 M20
ds max 34 38 45 50 55 65 70 80
min 33 37 44 49 53.8 63.8 68.8 78.8
k Nominal Size 26 30 35 40 45 50 55 62
max 27 31 36.25 41.25 46.25 51.25 56.5 63.5
min 25 29 33.75 38.75 43.75 48.75 53.5 60.5
s max 43.25 49.25 57.5 65.5 73.5 81.5 91.75 101.75
min 40.75 46.75 54.5 62.5 70.5 78.5 88.25 98.25
s1 Nominal Size 80 88 102 115 128 140 155 170
max 81.5 89.75 103.75 116.75 130 142 157 172
min 78.5 86.25 100.25 113.25 126 138 153 168
t min 22 22 26 26 26 33 33 33
Weight of per 1000 steel products(≈kg) - - - - - - - -
Length of Thread b - - - - - - - -


a) Materilal: Steel; Other strength classes or materials by agreement.

b) Mechanical properties : strength classes (material) ≤ M 39: 4.6 or 5.6 at the choice of the manufacturer ;> M39: by arrangement ; Standard DIN EN ISO 898-1


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