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 |
| 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 | ||||
| GBB1475DTASM | M14 x 75* | 20 | 15 | 14 | 35 | 32 | 38 | 32 | ||||
| GBB14125DTASM | M14 x 125* | 20 | 15 | 28 | 82 | 32 | 38 | 32 | ||||
| GBB14185DTASM | M14 x 185* | 20 | 15 | 75 | 142 | 32 | 38 | 32 | ||||
| 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.
High TensileGeomet 500B Blind Bolt Design to BS 5950-1 | ||||||
| Diameter | Tension Capacity | Shear Capacity | Shear Capacity Over Slot | Bearing Capacity | Recommended | |
| Pt (kN) | Ps, thread (kN) | Ps, slot (kN) | S275 Pb, (kN) | S355 | Torque (Nm) | |
| M 8 | 9.8 | 14.6 | 7.9 | 20.7 | 24.8 | 15 |
| M 10 | 14.1 | 23.2 | 15.8 | 27.6 | 33.0 | 24 |
| M 12 | 22.4 | 33.7 | 22.0 | 32.2 | 38.5 | 30 |
| M 14 | 34.8 | 46.0 | 29.0 | 36.8 | 44.0 | 40 |
| M 16 | 38.8 | 62.7 | 43.0 | 46.0 | 55.0 | 50 |
| M 20 | 71.4 | 97.9 | 63.4 | 55.2 | 66.0 | 65 |
| M 24 | 116.7 | 141.0 | 87.8 | 64.4 | 77.0 | 75 |
| M 30 | 174.5 | 224.0 | 137.2 | 80.5 | 96.3 | 85 |
| These values are suitable for
design to BS 5950-1 and can be used without further reduction for
comparison to factored loads. Bearing resistances for different
plate thicknesses can be calculated by scaling the values in
proportion to the thickness, but should only be used where the
distance from the centre line of the hole to the end of the plate
is greater than 2d. Combined tension and shear should satisfy the following equation:  | ||||||
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.
High Tensile Geomet 500B Blind Bolt Design to BS EN 1993-1-8 | ||||||
| Diameter | Tension Resistance | Shear
Resistance Over Thread | Shear
Resistance Over Slot | Bearing Resistance in 10mm Plate | Recommended Tightening Torque | |
| Ft, Rd (kN) | Fv, Rd thread (kN) | Fv, Rd Slot (kN) | S275 Fb, Rd(kN) | S375 Fb, Rd(kN) | (Nm) | |
| M 8 | 9.8 | 14.6 | 9.1 | 65.6 | 75.2 | 15 |
| M 10 | 14.1 | 23.2 | 19.0 | 82.0 | 94.0 | 24 |
| M 12 | 22.4 | 33.7 | 26.4 | 98.4 | 112.8 | 30 |
| M 14 | 34.8 | 46.7 | 29.0 | 114.8 | 131.6 | 40 |
| M 16 | 38.8 | 62.7 | 49.1 | 131.2 | 150.4 | 50 |
| M 20 | 71.4 | 97.9 | 76.1 | 164.0 | 188.0 | 65 |
| M 24 | 116.7 | 141.0 | 105.4 | 196.8 | 225.6 | 75 |
| M 30 | 174.5 | 224.0 | 164.6 | 246.0 | 282.0 | 85 |
These are design values for use with BS EN 1993-1-8, and a partial safety factor of γM2 = 1.25 has already been applied. Bearing resistances should be calculated from BS EN 1993-1-8, Table 3.4, taking d as the nominal diameter of the bolt. 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. Combined tension and shear should satisfy the following equation:  | ||||||
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.
Stainless Steel Blind Bolts
Blind Bolt Product Specification Stainless Steel A4-70 | ||||||||||||
| Product Code | Bolt Size | Box Qty | Hole Diameter |
| 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:  | |||||||
Important Note
Note that the above tension capacities make no allowance for the deformation or yield of the supporting parts. An appropriate design model for connections in hollow sections can be found in Joints in Steel Construction: Simple Connections.
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 | 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:
| |||||||
Important Note
Note that the above tension capacities make no allowance for the deformation or yield of the supporting parts.