Blind Bolt Technical Data

NOTE: All dimensions are in mm unless stated otherwise.

The Blind Bolt Company reserve the right to change these technical details without notice.

Blind Bolt Product Specification Geomet 500B - Property Class 10.9
Product Code Bolt Size Box
Qty		 Hole
Diameter
Fixing Thickness
Min Max
Anchor
Clearance		 Depth
Clearance		 Minimum
Hole Centers
BB0850DTASM M8 x 50 50 9 9 24 19 25 20
BB1060DTASM M10 x 60 40 11 10 30 23 30 20
BB1095DTASM M10 x 95 20 11 25 65 23 30 20
BB10130DTASM M10 x 130 20 11 55 100 23 30 20
BB1270DTASM M12 x 70 20 13 12 35 26 35 25
BB12120DTASM M12 x 120 25 13 30 85 26 35 25
BB12180DTASM M12 x 180 20 13 80 140 26 35 25
GBB1690DTASM M16 x 90* 20 17 13 43 36 43 35
GBB16130DTASM M16 x 130* 15 17 40 75 36 43 35
GBB16180DTASM M16 x 180* 10 17 55 125 36 43 35
GBB20110DTASM M20 x 110* 10 22 21 56 44 56 48
GBB20140DTASM M20 x 140* 8 22 21 86 44 56 48
GBB20180DTASM M20 x 180* 10 22 80 120 44 56 48
GBB20250DTASM M20 x 250* 10 22 130 185 44 56 48
GBB24130DTASM M24 x 130* 5 26 21 66 53 64 60
GBB30140DTASM M30 x 140* 5 32 27 60 65 72 75
* We strongly recommend the use of our safety gauges when installing these bolts

Important Note

The below tension resistances make no allowance for the deformation or yield of the connected parts. An appropriate design model for connections in hollow sections can be found in Joints in Steel Construction: Simple Connections.

Blind Bolt Design Capacities NZS 3404:1997 or AS 4100:1998
Diameter Tension Capacity
Φ'Ntf (kN)		 Shear Capacity
Over Thread
 Φ'Vf (thread) (kN)		 Shear Capacity
Over Slot
Φ'Vf (slot) (kN)		 Recommended
Tightening
Torque (Nm)
M8 6.9 14.6 11.1 15
M 10 12.9 23.2 19.0 24
M 12 18.8 33.7 26.3 30
M 16 40.1 62.7 51.5 50
M 20 57.8 97.9 76.1 65
M 24 82.3 141.0 105.4 75
Important Note: The above tension resistances make no allowance for the deformation or yield of the connected parts. An appropriate design model for connections in hollow sections can be found in Joints in Steel Construction: Simple Connections

The bearing capacity of the ply should be calculated in accordance with the design Standard, based on the nominal diameter df of the bolt. No reduction for the slot is necessary. Bolts subject to combined shear and tension should be verified in accordance with the design Standard, using the values of Φ'Vf (slot) and Φ'Ntf from the table above. The above design values were prepared by SCI, UK, following a program of tests. Design values verified by HERA, NZ are shown below

Diameter Tension Capacity
Φ'Ntf (kN)		 Shear Capacity
Over Slot
Φ'Vf (slot) (kN)
M 10 12.0 20.6
M 20 63.7 122.5
M 24 86.7 202.6
Important Note: The above tension resistances make no allowance for the deformation or yield of the connected parts. An appropriate design model for connections in hollow sections can be found in Joints in Steel Construction: Simple Connections

Blind Bolt Product Specification Stainless Steel A4-70 
Product Code Bolt Size Box
Qty		 Hole
Diameter
Fixing Thickness
Min Max
Anchor
Clearance		 Depth
Clearance		 Minimum
Hole Centers
BB0850A4ASM M8 x 50 50 9 9 24 19 25 20
BB1060A4ASM M10 x 60 40 11 10 30 23 30 20
BB1290A4ASM M12 x 90 20 13 12 55 26 35 25
GBB16100A4ASM* M16 x 100 20 17 13 53 36 43 35
* We strongly recommend the use of our safety gauges when installing these bolts

Stainless Steel Blind Bolt Design to BS 5950
Diameter Tension Capacity
Pt (kN)		 Shear Capacity
Over Thread
Ps, thread (kN)		 Shear Capacity Over Slot
Ps, slot (kN)		 Bearing Capacity
in 10mm Plate		 Recommended
Tightening
Torque (Nm)
        S275
Pb, (kN)		 S355
Pb, (kN)		  
M 8 5.3 10.3 6.5 20.7 24.8 15
M 10 12.7 16.2 11.1 27.6 33.0 22
M 12 21.4 23.6 15.4 32.2 38.5 28
M 16 42.8 44.0 30.1 46.0 55.0 45

These capacities are suitable for design to BS 5950-1 and can be compared directly with factored loads. Bearing resistances for different thicknesses can be calculated by scaling the values given in proportion to the thickness, but should only be used when the end distance is greater than 2d.

Bolts subject to combined tension and shear should satisfy the following expression:

Stainless Steel Blind Bolt Design to BS EN 1993
Diameter Tension Resistance
Ft,Rd (kN)		 Shear Resistance
Over Thread
Fv,Rd thread(kN)		 Shear Resistance
Over Slot
Fv,Rd slot (kN)		 Bearing Capacity
in 10mm Plate		 Recommended
Tightening
Torque (Nm)
       

S275
Fb,Rd(kN)

 S355
Fb,Rd(kN)		  
M 8 5.3 12.3 7.8 65.6 75.2 15
M 10 12.7 19.5 13.3 82.0 94.0 22
M 12 22.0 28.3 18.4 98.4 112.8 28
M 16 42.9 52.8 36.1 131.2 150.4 45

These design resistances are suitable for design to BS EN 1993 and can be compared directly with design loads. The quoted bearing resistances assume k1 = 2.5 and αb = 1.0. For different arrangements the bearing resistance should be calculated using the expression in Table 3.4 of BS EN 1993-1-8, with d as the nominal diameter of the blind bolt.

Bolts subject to combined tension and shear should satisfy the following expression:

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