Hoses-Grommets-&-Clamps > Wire-Grommets

Locking Dome Plugs - 5/16"-1/2" Mounting Hole

Wire Locking Plugs

Locking dome plugs are used to temporarily or permanently close unused panel holes and knockouts. They are made from a Nylon 6/6 material. Available plugs range from a 5/16" mounting hole diameter up to a 2" mounting hole diameter. Dome plugs also have multiple locking steps to cover different panel thicknesses. Available plugs will fit up to a 0.125" thick panel. Plug heads are convex and thin to the edges. Approximate head thickness is 0.062" (may vary).


  • Quick & easy installation.
  • Nylon 6/6 material.
  • Mounting Hole Dia Range: 5/16" - 2".
  • Multiple locking positions for panel thickness up to 0.125".
  • Flammability Rating: 94V-2.
  • Temperature Rating: -40°F to 221°F (-40°C to 105°C).
  • Click here to view the Locking Dome Plug Size Chart
Item Description Price
1+ I Ext. Price I 1000+ Ext. Price I I 5000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
5053 Heyco 2613, Locking Dome Plug, 5/16" Mounting Hole Dia (100 MIN)
0.07200 7.20 I 0.06400 6.40 I 0.04900 4.90
100 EA ✓
5054 Heyco 2617, Locking Dome Plug, 3/8" Mounting Hole Dia (100 MIN)
0.06 6.00 I 0.05400 5.40 I 0.04100 4.10
100 EA ✓
5055 Heyco 2633, Locking Dome Plug, 7/16" Mounting Hole Dia (100 MIN)
0.06800 6.80 I 0.05800 5.80 I 0.04200 4.20
100 EA ✓
5056 Heyco 2643, Locking Dome Plug, 1/2" Mounting Hole Dia (100 MIN)
0.07200 7.20 I 0.06100 6.10 I 0.05600 5.60
100 EA ✓

Locking Dome Plugs - 9/16"-3/4" Mounting Hole

Locking Plugs

Locking dome plugs are used to temporarily or permanently close unused panel holes and knockouts. They are made from a Nylon 6/6 material. Available plugs range from a 5/16" mounting hole diameter up to a 2" mounting hole diameter. Dome plugs also have multiple locking steps to cover different panel thicknesses. Available plugs will fit up to a 0.125" thick panel. Plug heads are convex and thin to the edges. Approximate head thickness is 0.062" (may vary).


  • Quick & easy installation.
  • Nylon 6/6 material.
  • Mounting Hole Dia Range: 5/16" - 2".
  • Multiple locking positions for panel thickness up to 0.125".
  • Flammability Rating: 94V-2.
  • Temperature Rating: -40°F to 221°F (-40°C to 105°C).
  • Click here to view the Locking Dome Plug Size Chart
Item Description Price
1+ I Ext. Price I 1000+ Ext. Price I I 5000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
5057 Heyco 2653, Locking Dome Plug, 9/16" Mounting Hole Dia (100 MIN)
0.09100 9.10 I 0.08100 8.10 I 0.06300 6.30
100 EA ✓
5058 Heyco 2663, Locking Dome Plug, 5/8" Mounting Hole Dia (100 MIN)
0.09600 9.60 I 0.08500 8.50 I 0.06400 6.40
100 EA ✓
5059 Heyco 2673, Locking Dome Plug, 11/16" Mounting Hole Dia (100 MIN)
0.13700 13.70 I 0.12300 12.30 I 0.09500 9.50
100 EA ✓
5060 Heyco 2683, Locking Dome Plug, 3/4" Mounting Hole Dia (100 MIN)
0.14400 14.40 I 0.12900 12.90 I 0.09900 9.90
100 EA ✓

Locking Dome Plugs - 13/16"-1 1/8" Mounting Hole

Wire Locking Plugs

Locking dome plugs are used to temporarily or permanently close unused panel holes and knockouts. They are made from a Nylon 6/6 material. Available plugs range from a 5/16" mounting hole diameter up to a 2" mounting hole diameter. Dome plugs also have multiple locking steps to cover different panel thicknesses. Available plugs will fit up to a 0.125" thick panel. Plug heads are convex and thin to the edges. Approximate head thickness is 0.062" (may vary).


  • Quick & easy installation.
  • Nylon 6/6 material.
  • Mounting Hole Dia Range: 5/16" - 2".
  • Multiple locking positions for panel thickness up to 0.125".
  • Flammability Rating: 94V-2.
  • Temperature Rating: -40°F to 221°F (-40°C to 105°C).
  • Click here to view the Locking Dome Plug Size Chart
Item Description Price
1+ I Ext. Price I 1000+ Ext. Price I I 5000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
5061 Heyco 2693, Locking Dome Plug, 13/16" Mounting Hole Dia (100 MIN)
0.15600 15.60 I 0.14 14.00 I 0.10800 10.80
100 EA ✓
5062 Heyco 2703, Locking Dome Plug, 7/8" Mounting Hole Dia (100 MIN)
0.15900 15.90 I 0.14300 14.30 I 0.11 11.00
100 EA ✓
5066 Heyco 2713, Locking Dome Plug, 1" Mounting Hole Dia (100 MIN)
0.16100 16.10 I 0.14500 14.50 I 0.11100 11.10
100 EA ✓
5067 Heyco 2723, Locking Dome Plug, 1-1/8" Mounting Hole Dia (100 MIN)
0.17 17.00 I 0.15300 15.30 I 0.11800 11.80
100 EA ✓

Locking Dome Plugs - 1 3/8"-2" Mounting Hole

Wire Locking Plugs

Locking dome plugs are used to temporarily or permanently close unused panel holes and knockouts. They are made from a Nylon 6/6 material. Available plugs range from a 5/16" mounting hole diameter up to a 2" mounting hole diameter. Dome plugs also have multiple locking steps to cover different panel thicknesses. Available plugs will fit up to a 0.125" thick panel. Plug heads are convex and thin to the edges. Approximate head thickness is 0.062" (may vary).


  • Quick & easy installation.
  • Nylon 6/6 material.
  • Mounting Hole Dia Range: 5/16" - 2".
  • Multiple locking positions for panel thickness up to 0.125".
  • Flammability Rating: 94V-2.
  • Temperature Rating: -40°F to 221°F (-40°C to 105°C).
  • Click here to view the Locking Dome Plug Size Chart
Item Description Price
1+ I Ext. Price I 1000+ Ext. Price I I 5000+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
5068 Heyco 2753, Locking Dome Plug, 1-3/8" Mounting Hole Dia (100 MIN)
0.18700 18.70 I 0.16700 16.70 I 0.12900 12.90
100 EA ✓
5069 Heyco 2763, Locking Dome Plug, 1-1/2" Mounting Hole Dia (100 MIN)
0.25300 25.30 I 0.22700 22.70 I 0.17500 17.50
100 EA ✓
5071 Heyco 2783, Locking Dome Plug, 2" Mounting Hole Dia (100 MIN)
0.36900 36.90 I 0.33 33.00 I 0.25500 25.50
100 EA ✓
Prop65 Warning