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What are Toggle Bolts?

What are Toggle Bolts?


Table Of Content


What is Toggle Bolt?

Toggle bolts are type of fasteners and it is also called butterfly anchors. Toggle bolts have two main parts (1) screw (2) nut. Toggle bolts are mainly used in drywall, plaster, and concrete. Stainless steel toggle bolts nut has two spring loaded "wings". Toggle screws have ultimate load capacities. butterfly bolts wings provide extra support for heavier objects.


Understanding Butterfly Bolts Size Chart


Toggle Bolt Size Chart

Anchor Sizes Size of Thread Size of Drill Bit Mushroom Head Height (M) Diameter of Mushroom Head (S) Round Head Height (R) Diameter of Round Head (D)
Minimum Maximum Minimum Maximum Minimum Maximum Minimum Maximum
1/2 1/2-13 1-1/4 .250 .280 1.028 1.073 .332 .355 .766 .813
1/4 1/4-20 5/8 .133 .150 .546 .573 .160 .175 .443 .472
1/8 6-32 3/8 .074 .086 .303 .321 .091 .103 .240 .260
3/8 3/8-16 7/8 .191 .215 .787 .823 .237 .256 .670 .708
3/16 10-24 1/2 .113 .128 .425 .448 .123 .137 .334 .359
5/16 5/16-18 7/8 .162 .183 .666 .698 .198 .216 .557 .590

Anchor Sizes Size of Thread Performance Information
In 1/2" Wallboard In Hollow Block
Shear (lbs.) Tensile (lbs.) Shear (lbs.) Embedment Depth Tensile (lbs.)
1/2 1/2-13 470 435 3620 1-1/4 2550
1/4 1/4-20 350 310 1390 5/8 830
1/8 6-32 205 200 270 3/8 310
3/8 3/8-16 440 340 3120 7/8 1385
3/16 10-24 280 245 700 1/2 430
5/16 5/16-18 420 330 2980 7/8 1070

Toggle Anchors Online Used in Heavy Duty Mounting


Application of Butterfly Bolts

  • Heavy Item Mounting
  • Hollow Material Fastening
  • Replacing Failing Anchors

Find Types Of Toggle Screws And Their Load Capacity


Types of Toggle Bolts

  • Butterfly Bolts
  • Toggle Anchors
  • Heavy Duty Toggle Bolts
  • Marine Toggle Bolts
  • Metal Toggle Bolts
  • Toggle Bolt Anchor
  • Toggle Bolts For Metal Studs
  • Flip Toggle Anchor
  • Concrete Toggle Bolts
  • Butterfly Toggle Bolts
  • Large Toggle Bolts
  • Heavy Machinery
  • Butterfly Anchor Bolts
  • High Strength Toggle Anchors
  • Toggle Screws

Toggle Bolt Load Capacity

Anchor 5/8" Wallboard 3/8" Wallboard 3/4" Wallboard 1/2" Wallboard
Diameter Shear Tension Shear Tension Shear Tension Shear Tension
in. lbs. lbs. lbs. lbs. lbs. lbs. lbs. lbs.
(kN) (kN) (kN) (kN) (kN) (kN) (kN) (kN)
5/16 300 275 240 240 340 320 280 250
(1.4) (1.2) (1.1) (1.1) (1.5) (1.4) (1.3) (1.1)
3/16 235 235 140 130 280 290 190 185
(1.1) (1.1) (0.6) (0.6) (1.3) (1.3) (0.9) (0.8)
3/8 315 290 250 245 355 340 295 255
(1.4) (1.3) (1.1) (1.1) (1.6) (1.5) (1.3) (1.1)
1/8 180 190 120 115 210 220 135 150
(0.8) (0.9) (0.5) (0.5) (0.9) (1.0) (0.6) (0.7)
1/4 260 265 210 215 300 315 235 235
(1.2) (1.2) (0.9) (1.0) (1.4) (1.4) (1.1) (1.1)
1/2 375 390 275 255 400 415 315 325
(1.7) (1.8) (1.2) (1.1) (1.8) (1.9) (1.4) (1.5)

Features of Stainless Steel Toggle Bolts

  • Higher load capacity
  • Practical and economical
  • Allows future modifications
  • Designed for easier installation

Installation Specifications of Toggle Anchors

Dimensions Anchor Size
5/16" 3/16" 3/8" 1/8" 1/4" 1/2"
Wall Board SuggestedDrill Bit Size (in.) 7/8 5/8 1 7/16 3/4 1-3/8
Hollow CMU andHollow CoreConcrete (ANSI) 7/8 1/2 7/8 3/8 5/8 1-1/4
7/8 9/16 1 1/2 3/4 1-1/4
Thread Size, TPI (UNC) 5/16-18 10-24 3/8-16 6-32 1/4-20 1/2-13
Plywood and LightGauge Steel 2-1/8 1-3/8 2-1/8 1-1/16 1-1/2 3

Anchor Component of Heavy Duty Toggle Bolts

Component of Anchor Component of Material
Zinc Plating ASTM B633, SC1, Type III, (Fe/Zn 5)
Wing CS (Carbon Steel)
Bolt CS (Carbon Steel)
Trunion Nut' CS (Carbon Steel)

Anchor Size of Mushroom Hex Head Toggle Bolt

Size of Anchor Size of Head (O.D.) Diameter of Drill * Qty. of Pack Carton of Standard MH
SHH MH
1/8" x 4" - 7/16" 500 1/2" 50
1/4" x 4" - 17/32" 500 5/8" 50
1/8" x 2" - 5/16" 500 3/8" 50
1/4" x 3" - 17/32" 500 5/8" 50
1/8" x 3" 11/32" 5/16" 500 3/8" 50
3/16" x 4" - 7/16" 500 1/2" 50
1/8" x 4" - 5/16" 500 3/8" 50

Anchor Size of Round Hex Head Toggle Bolt

Size of Anchor Size of Head (O.D.) Diameter of Drill * Qty. of Pack Carton of Standard MH
SHH MH
1/8" x 4" - 7/16" 500 1/2" 50
1/4" x 4" - 17/32" 500 5/8" 50
1/8" x 2" - 5/16" 500 3/8" 50
1/4" x 3" - 17/32" 500 5/8" 50
1/8" x 3" 11/32" 5/16" 500 3/8" 50
3/16" x 4" - 7/16" 500 1/2" 50
1/8" x 4" - 5/16" 500 3/8" 50

Toggle Bolt Installation

Installation Process Post-installation
Creating the Pilot Hole Testing Stability
Inserting the Toggle Bolt Mounting Shelves and Items
Securing the Bolt