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MATERIALS
ANCHOR SIZE RANGE (TYP.)
SUITABLE BASE MATERIALS
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BoxBolt® Technical Information
Technical Data for Choosing the Correct BoxBolt Blind Fasteners
The technical data below contains all the information necessary for selecting the correct BoxBolt blind fasteners.
- The load carrying capacity of the assembly depends on the type of section used and its cross-section
- The permissible load is limited by the permissible load of the weakest component in the assembly, namely the section itself in the case of thin wall sections, or the BoxBolt in the case of thick wall sections (or combination of the two)
- If there is any doubt, it is essential to consult a Tanner Product Specialist and/or have the application checked by a qualified Structural Engineer
The Original BoxBolt® Technical Information
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Part Number & Description
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Dimensional Information | Load Information | |||||||||||
| Finish | Product Code | Bolt Dia | Description | Setscrew Length | Clamping Range (Min) | Clamping Range (Max) | Across Flats of Shoulder | Shoulder Thickness | Sleeve Dia | Hole Size Dia | Available Strength (lbs.) (Tensile) | Available Strength (lbs.) (Shear) | Torque (ft lb) |
| Zinc | BQ1Z06* | 1/4" | 1/4" BoxBolt ® Size 1 | 1-3/4" | 1/8" | 7/8" | 11/16" | 3/16" | 3/8" | 7/16" | 2,872 | 4,793 | 14 |
| Zinc | BQ1Z08 | 5/16" | 5/16" BoxBolt ® Size 1 | 2" | 3/16" | 1" | 7/8" | 1/4" | 1/2" | 9/16" | 5,071 | 5,917 | 18 |
| Zinc | BQ2Z08 | 5/16" | 5/16" BoxBolt ® Size 2 | 2-3/4" | 11/16" | 1-13/16" | 7/8" | 1/4" | 1/2" | 9/16" | 5,071 | 5,917 | 18 |
| Zinc | BQ3Z08 | 5/16" | 5/16" BoxBolt ® Size 3 | 3-9/16" | 1-3/16" | 2-5/8" | 7/8" | 1/4" | 1/2" | 9/16" | 5,071 | 5,917 | 18 |
| Zinc | BQ1Z10 | 3/8" | 3/8" BoxBolt ® Size 1 | 2" | 3/16" | 7/8" | 15/16" | 1/4" | 11/16" | 3/4" | 9,718 | 10,985 | 33 |
| Zinc | BQ2Z10 | 3/8" | 3/8" BoxBolt ® Size 2 | 2-3/4" | 11/16" | 1-11/16" | 15/16" | 1/4" | 11/16" | 3/4" | 9,718 | 10,985 | 33 |
| Zinc | BQ3Z10 | 3/8" | 3/8" BoxBolt ® Size 3 | 3-9/16" | 1-3/8" | 2-1/2" | 15/16" | 1/4" | 11/16" | 3/4" | 9,718 | 10,985 | 33 |
| Zinc | BQ1Z12 | 1/2" | 1/2" BoxBolt ® Size 1 | 2-3/16" | 3/16" | 1" | 1" | 5/16" | 3/4" | 13/16" | 13,015 | 12,676 | 59 |
| Zinc | BQ2Z12 | 1/2" | 1/2" BoxBolt ® Size 2 | 3-1/8" | 3/4" | 2' | 1" | 5/16" | 3/4" | 13/16" | 13,015 | 12,676 | 59 |
| Zinc | BQ3Z12 | 1/2" | 1/2" BoxBolt ® Size 3 | 4" | 1-9/16" | 2-3/4" | 1" | 5/16" | 3/4" | 13/16" | 13,015 | 12,676 | 59 |
| Zinc | BQ1Z16 | 5/8" | 5/8" BoxBolt ® Size 1 | 3" | 3/16" | 1-3/8" | 1-7/16” | 3/8" | 1" | 1-1/16" | 26,199 | 29,578 | 140 |
| Zinc | BQ2Z16 | 5/8" | 5/8" BoxBolt ® Size 2 | 4" | 1-3/16" | 2-3/8" | 1-7/16" | 3/8" | 1" | 1-1/16" | 26,199 | 29,578 | 140 |
| Zinc | BQ3Z16 | 5/8" | 5/8" BoxBolt ® Size 3 | 4-3/4" | 2-3/16" | 3-1/8" | 1-7/16" | 3/8" | 1" | 1-1/16" | 26,199 | 29,578 | 140 |
| Zinc | BQ1Z20 | 3/4" | 3/4" BoxBolt ® Size 1 | 4" | 5/16" | 1-5/8" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 36,932 | 33,804 | 221 |
| Zinc | BQ2Z20 | 3/4" | 3/4" BoxBolt ® Size 2 | 4-3/4" | 1-3/8" | 2-13/16" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 36,932 | 33,804 | 221 |
| Zinc | BQ3Z20 | 3/4" | 3/4" BoxBolt ® Size 3 | 6" | 2-9/16" | 4" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 36,932 | 33,804 | 221 |
| Part Number & Description | Dimensional Information | Load Information | |||||||||||
| Finish | Product Code | Bolt Dia | Description | Setscrew Length |
Clamping Range (Min)
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Clamping Range (Max)
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Across Flats of Shoulder
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Shoulder Thickness
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Sleeve Dia | Hole Size Dia |
Available Strength (lbs.) (Tensile)
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Available Strength (lbs.) (Shear)
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Torque (ft lb) |
| SS | BQ1S06 | 1/4" |
1/4" BoxBolt Size 1
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1-3/4" | 1/8" | 7/8" | 11/16" | 3/16" | 3/8" | 7/16" | 2,872 | 4,793 | 14 |
| SS | BQ1S08 | 5/16" |
5/16" BoxBolt Size 1
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2" | 3/16" | 1" | 7/8" | 1/4" | 1/2" | 9/16" | 4,314 | 6,787 | 18 |
| SS | BQ2S08 | 5/16" |
5/16" BoxBolt Size 2
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2-3/4" | 11/16" | 1-13/16" | 7/8" | 1/4" | 1/2" | 9/16" | 4,314 | 6,787 | 18 |
| SS | BQ3S08 | 5/16" |
5/16" BoxBolt Size 3
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3-9/16" | 1-3/16" | 2-5/8" | 7/8" | 1/4" | 1/2" | 9/16" | 4,314 | 6,787 | 18 |
| SS | BQ1S10 | 3/8" |
3/8" BoxBolt Size 1
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2" | 3/16" | 7/8" | 15/16" | 1/4" | 11/16" | 3/4" | 6,839 | 12,222 | 33 |
| SS | BQ2S10 | 3/8" |
3/8" BoxBolt Size 2
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2-3/4" | 11/16" | 1-11/16" | 15/16" | 1/4" | 11/16" | 3/4" | 6,839 | 12,222 | 33 |
| SS | BQ3S10 | 3/8" |
3/8" BoxBolt Size 3
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3-9/16" | 1-3/8" | 2-1/2" | 15/16" | 1/4" | 11/16" | 3/4" | 6,839 | 12,222 | 33 |
| SS | BQ1S12 | 1/2" |
1/2" BoxBolt Size 1
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2-3/16" | 3/16" | 1" | 1" | 5/16" | 3/4" | 13/16" | 9,945 | 15,543 | 59 |
| SS | BQ2S12 | 1/2" |
1/2" BoxBolt Size 2
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3-1/8" | 3/4" | 2' | 1" | 5/16" | 3/4" | 13/16" | 9,945 | 15,543 | 59 |
| SS | BQ3S12 | 1/2" |
1/2" BoxBolt Size 3
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4" | 1-9/16" | 2-3/4" | 1" | 5/16" | 3/4" | 13/16" | 9,945 | 15,543 | 59 |
| SS | BQ1S16 | 5/8" |
5/8" BoxBolt Size 1
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3" | 3/16" | 1-3/8" | 1-7/16” | 3/8" | 1" | 1-1/16" | 18,523 | 28,191 | 140 |
| SS | BQ2S16 | 5/8" |
5/8" BoxBolt Size 2
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4" | 1-3/16" | 2-3/8" | 1-7/16" | 3/8" | 1" | 1-1/16" | 18,523 | 28,191 | 140 |
| SS | BQ3S16 | 5/8" |
5/8" BoxBolt Size 3
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4-3/4" | 2-3/16" | 3-1/8" | 1-7/16" | 3/8" | 1" | 1-1/16" | 18,523 | 28,191 | 140 |
| SS | BQ1S20 | 3/4" |
3/4" BoxBolt Size 1
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4" | 5/16" | 1-5/8" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 28,909 | 47,203 | 221 |
| SS | BQ2S20 | 3/4" |
3/4" BoxBolt Size 2
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4-3/4" | 1-3/8" | 2-13/16" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 28,909 | 47,203 | 221 |
| SS | BQ3S20 | 3/4" |
3/4" BoxBolt Size 3
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6" | 2-9/16" | 4" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 28,909 | 47,203 | 221 |
| Finish | Product Code | Bolt Dia | Description | Setscrew Length |
Clamping Range (Min)
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Clamping Range (Max)
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Across Flats of Shoulder
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Shoulder Thickness
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Sleeve Dia | Hole Size Dia |
Available Strength (lbs.) (Tensile)
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Available Strength (lbs.) (Shear)
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Torque (ft lb) |
| HDG | BQ1G08 | 5/16" |
5/16" BoxBolt Size 1
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2" | 3/16" | 1" | 7/8" | 1/4" | 1/2" | 9/16" | 5,071 | 5,917 | 18 |
| HDG | BQ2G08 | 5/16" |
5/16" BoxBolt Size 2
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2-3/4" | 11/16" | 1-13/16" | 7/8" | 1/4" | 1/2" | 9/16" | 5,071 | 5,917 | 18 |
| HDG | BQ3G08 | 5/16" |
5/16" BoxBolt Size 3
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3-9/16" | 1-3/16" | 2-5/8" | 7/8" | 1/4" | 1/2" | 9/16" | 5,071 | 5,917 | 18 |
| HDG | BQ1G10 | 3/8" |
3/8" BoxBolt Size 1
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2" | 3/16" | 7/8" | 15/16" | 1/4" | 11/16" | 3/4" | 9,718 | 10,985 | 33 |
| HDG | BQ2G10 | 3/8" |
3/8" BoxBolt Size 2
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2-3/4" | 11/16" | 1-11/16" | 15/16" | 1/4" | 11/16" | 3/4" | 9,718 | 10,985 | 33 |
| HDG | BQ3G10 | 3/8" |
3/8" BoxBolt Size 3
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3-9/16" | 1-3/8" | 2-1/2" | 15/16" | 1/4" | 11/16" | 3/4" | 9,718 | 10,985 | 33 |
| HDG | BQ1G12 | 1/2" |
1/2" BoxBolt Size 1
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2-3/16" | 3/16" | 1" | 1" | 5/16" | 3/4" | 13/16" | 13,015 | 12,676 | 59 |
| HDG | BQ2G12 | 1/2" |
1/2" BoxBolt Size 2
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3-1/8" | 3/4" | 2' | 1" | 5/16" | 3/4" | 13/16" | 13,015 | 12,676 | 59 |
| HDG | BQ3G12 | 1/2" |
1/2" BoxBolt Size 3
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4" | 1-9/16" | 2-3/4" | 1" | 5/16" | 3/4" | 13/16" | 13,015 | 12,676 | 59 |
| HDG | BQ1G16 | 5/8" |
5/8" BoxBolt Size 1
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3" | 3/16" | 1-3/8" | 1-7/16” | 3/8" | 1" | 1-1/16" | 26,199 | 29,578 | 140 |
| HDG | BQ2G16 | 5/8" |
5/8" BoxBolt Size 2
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4" | 1-3/16" | 2-3/8" | 1-7/16" | 3/8" | 1" | 1-1/16" | 26,199 | 29,578 | 140 |
| HDG | BQ3G16 | 5/8" |
5/8" BoxBolt Size 3
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4-3/4" | 2-3/16" | 3-1/8" | 1-7/16" | 3/8" | 1" | 1-1/16" | 26,199 | 29,578 | 140 |
| HDG | BQ1G20 | 3/4" |
3/4" BoxBolt Size 1
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4" | 5/16" | 1-5/8" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 36,932 | 33,804 | 221 |
| HDG | BQ2G20 | 3/4" |
3/4" BoxBolt Size 2
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4-3/4" | 1-3/8" | 2-13/16" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 36,932 | 33,804 | 221 |
| HDG | BQ3G20 | 3/4" |
3/4" BoxBolt Size 3
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6" | 2-9/16" | 4" | 1-13/16" | 7/16" | 1-1/4" | 1-5/16" | 36,932 | 33,804 | 221 |