4 Inch Octagon Extension Ring 1-1/2 Inch Deep 1/2 Inch Knockouts 55151-1/2 (Pack of 100)
4 Inch Octagon Extension Ring 1-1/2 Inch Deep 1/2 Inch Knockouts 55151-1/2 (Pack of 100)
No reviews
SKU:
55151-1/2
Select a Variant
4 Inch Octagon Extension Ring 1-1/2 Inch Deep 1/2 Inch Knockouts 55151-1/2 (Pack of 100)
- 3-1/2 Inch Octagon Box 1-1/2 Inch Deep Non-Metallic Clamp 24151-R (pack of 40)
- 4 Inch Octagon Box 2-1/8 Inch Deep 1/2 And 3/4 Knockouts 54171-S (Pack of 65)
- 4 Inch Octagon Box 3-1/2 Inch Deep 1/2 And 3/4 Knockouts 54181-S (Pack of 20)
- 4 Inch Blank Octagon Box 3-1/2 Inch Deep No Knockouts 54181-BLNK (Pack of 25)
- 4 Inch Octagon Extension Ring 1-1/2 Inch Deep 1/2 And 3/4 Inch Knockouts 55151-S (Pack of 100)
- 4 Inch Octagon Extension Ring 2-1/8 Inch Deep 1/2 And 3/4 Inch Knockouts 55171-S (Pack of 30)
- 4 Inch Octagon Box 1-1/2 Inch Deep Flat Vertical Bracket Box Clamps 54151-FBX (Pack of 50)
- 4 Inch Octagon Box 1-1/2 Inch Deep Adjustable Bar Hanger MC Clamp 54151-HUBX (Pack of 50)
- 4 Inch Octagon Box 2-1/8 Inch Deep Flat Vertical Bracket BX Clamps 54171-FBX (Pack of 30)
- 4 Inch Octagon Box 2-1/8 Inch Deep J Flush Mount Wood Spike Bracket BX Clamps 54171-JBX (Pack of 30)
- 4 Inch Octagon Box For Cut In Old Work 1-1/2 Inch Deep 4 Threaded Mounting Tabs 54151-DEOW (Pack of 50)
- 4 Inch Octagon Cut In Old Work Box 2-1/8 Inch Deep BX Clamps 54171-OWBX (Pack of 25)
- 4 Inch Octagon Box 2-1/8 Inch Deep 4 Threaded Mounting Tabs 54171-DE (Pack of 50)
- 4 Inch Octagon Old Work Cut In Box 1-1/2 Inch Deep Non Metallic Clamps 54151-OWR (Pack of 50)
- 4 Inch Octagon Extension Ring 1-1/2 Inch Deep 3/4 Inch Knockouts 55151-3/4 (Pack of 40)
- 4 Inch Octagon Box 1-1/2 Inch Deep Adjustable Bar Hanger 54151-HU (Pack of 75)
- 4 Inch Octagon Box 1-1/2 Inch Deep Adjustable Bar Hanger Non Metallic Clamp 54151-HUR (Pack of 50)
- 4 Inch Octagon Box 1-1/2 Inch Deep Non Metallic Clamps 54151-R (Pack of 100)
- 4 Inch Blank Octagon Box 1-1/2 Inch Deep No Knockouts 54151-BLNK (Pack of 50)
- 4 Inch Blank Octagon Box 1-1/2 Inch Deep No Knockouts Stainless Steel 54151-BLNKSS (Pack of 50)
- 4 Inch Octagon Box 1-1/2 Inch Deep BX Clamps 54151-BX (Pack of 100)
- 4 Inch Octagon Box 1-1/2 Inch Deep 3/4 Inch Side Knockouts 54151-3/4 (Pack of 100)
- 4 Inch Octagon Box 1-1/2 Inch Deep 1/2 And 3/4 Knockouts 54151-S (Pack of 100)
- 4 Inch Octagon Box 1-1/2 Inch Deep 4 Threaded Mounting Tabs 54151-DE (Pack of 50)
- 4 Inch Blank Octagon Box 2-1/8 Inch Deep No Knockouts 54171-BLNK (Pack of 25)
- 4 Inch Blank Octagon Box 2-1/8 Inch Deep No Knockouts Stainless Steel 54171-BLNKSS (Pack of 25)
- 4 Inch Octagon Box 2-1/8 Inch Deep BX Clamps 54171-BX (Pack of 50)
- 4 Inch Octagon Box For Cut In Old Work 2-1/8 Inch Deep 4 Threaded Mounting Tabs 54171-DEOW (Pack of 25)
- 4 Inch Octagon Box 2-1/8 Deep 3/4 Inch Knockout 54171-3/4 (Pack of 125)
- 4 Inch Octagon Box 2-1/8 Inch Deep 1/2 Inch Knockouts 54171-1/2 (Pack of 65)
- 4 Inch Octagon Open Splice Box 2-1/8 Inch Deep 8 Side Slots And 4 Non Metallic Connectors 54171-OPR (Pack of 25)
- 4 Inch Octagon Box 2-1/8 Inch Deep Non Metallic Clamps 54171-R (Pack of 50)
- 4 Inch Octagon T Bar Box And 4 T Bar Slots 2-1/8 Inch Deep No Knockouts 54171-TBAR (Pack of 25)
- 4 Inch Octagon T-Bar Box Back Side Tie Wire and 4 T-Bar Slots 3-1/2 Inch Deep 54181-TBAR
- 4 Inch Octagon Box 1-1/2 Inch Deep Adjustable Flush Mount Wood Spike Bracket Non Metallic Clamps 54151-JR (Pack of 100)
- 4 Inch Octagon Box 1-1/2 Inch Deep Flat Vertical Bracket 54151-F (Pack of 100)
- 4 Inch Octagon Box 1-1/2 Inch Deep Adjustable J Flush Mount Wood Spike Bracket 54151-J (Pack of 50)
- 4 Inch Octagon Box 1-1/2 Inch Deep Adjustable Flush Mount Wood Spike Bracket BX Clamps 54151-JBX (Pack of 100)
- 4 Inch Octagon Box 1-1/2 Inch Deep Flat Vertical Bracket Non Metallic Clamps 54151-FR (Pack of 50)
- 4 Inch Octagon Box 2-1/8 Inch Deep Flat Vertical Bracket 54171-F (Pack of 50)
- 4 Inch Octagon Box 2-1/8 Inch Deep J Flush Mount Wood Spike Bracket Non Metallic Clamps 54171-JBR (Pack of 30)
- 4 Inch Octagon Box 2-1/8 Inch Deep Flat Vertical Bracket Non Metallic Clamps 54171-FR (Pack of 40)
- 4 Inch Octagon Fan Rated T-Bar Box Back Side Tie Wire And 4 T-Bar Slots 2-1/8 Inch Deep 54171-TBFN (Pack of 25)
- 4 Inch Octagon Old Work Cut In Box 1-1/2 Inch Deep 54151-OW (Pack of 50)
- 4 Inch Octagon Old Work Cut In Box 1-1/2 Inch Deep BX Clamps 54151-OWBX (Pack of 50)
- 4 Inch Octagon Cut In Old Work Box 2-1/8 Inch Deep 54171-OW (Pack of 50)
- 4 Inch Octagon Cut In Old Work Box 2-1/8 Inch Deep Non Metallic Clamps 54171-OWR (Pack of 25)
- 4 Inch Octagon Cut In Old Work Box 3-1/2 Inch Deep (2) 1/2 Inch Knockouts 54181-OW
- 4 Inch Octagon Box 2-1/8 Deep 1/2 Inch Knockout Blank 54171-1/2BB (Pack of 25)
Availability: In stock
Price:
- Regular price
- $148.20
- Sale price
- $148.20 Sale
Shipping Cost Calculated at Checkout. Standard Lead Time is 1 to 6 Business Days.
Quantity must be 1 or more
Where are we? 4 Continents 9 Countries

Got any Questions?
Speak with a real person who will go out of their way to help you!
Call Us: 1-516-482-6313Text Us: 1-516-703-3460
Quick Support
Product Information
Specification
About:
A 4-inch octagon extension ring is a component used in electrical installations to extend the depth of an existing octagon electrical box.The extension ring adds depth to the electrical box, allowing for additional wiring space or accommodating devices that require extra room, such as dimmer switches, receptacles, or GFCI outlets.
Also Known As:
Standard Extension Ring, Weatherproof Extension Ring, Insulated Extension Ring, Adjustable Extension Ring.
Specification:.
• Type : Extension Ring
• Size :1-1/ 2 Inch
• Material : Steel
Features:
• Combo-head fixture/cover mounting screws
• Combination knockouts allow for greater wiring flexibility
Reviews
Related products
3-1/2 Inch Octagon Box 1-1/2 Inch Deep Non-Metallic Clamp 24151-R (pack of 40)
3-1/2 Inch Octagon Box 1-1/2 Inch Deep Non-Metallic Clamp 24151-R (pack of 40)
No reviews
- Sale price
- $135.20
- Regular price
- $135.20
4 Inch Octagon Box 2-1/8 Inch Deep 1/2 And 3/4 Knockouts 54171-S (Pack of 65)
4 Inch Octagon Box 2-1/8 Inch Deep 1/2 And 3/4 Knockouts 54171-S (Pack of 65)
No reviews
- Sale price
- $130.13
- Regular price
- $130.13
4 Inch Octagon Box 3-1/2 Inch Deep 1/2 And 3/4 Knockouts 54181-S (Pack of 20)
4 Inch Octagon Box 3-1/2 Inch Deep 1/2 And 3/4 Knockouts 54181-S (Pack of 20)
No reviews
- Sale price
- $158.34
- Regular price
- $158.34
4 Inch Blank Octagon Box 3-1/2 Inch Deep No Knockouts 54181-BLNK (Pack of 25)
4 Inch Blank Octagon Box 3-1/2 Inch Deep No Knockouts 54181-BLNK (Pack of 25)
No reviews
- Sale price
- $318.50
- Regular price
- $318.50
4 Inch Octagon Extension Ring 1-1/2 Inch Deep 1/2 And 3/4 Inch Knockouts 55151-S (Pack of 100)
4 Inch Octagon Extension Ring 1-1/2 Inch Deep 1/2 And 3/4 Inch Knockouts 55151-S (Pack of 100)
No reviews
- Sale price
- $175.50
- Regular price
- $175.50
4 Inch Octagon Extension Ring 2-1/8 Inch Deep 1/2 And 3/4 Inch Knockouts 55171-S (Pack of 30)
4 Inch Octagon Extension Ring 2-1/8 Inch Deep 1/2 And 3/4 Inch Knockouts 55171-S (Pack of 30)
No reviews
- Sale price
- $137.28
- Regular price
- $137.28
4 Inch Octagon Box 1-1/2 Inch Deep Flat Vertical Bracket Box Clamps 54151-FBX (Pack of 50)
4 Inch Octagon Box 1-1/2 Inch Deep Flat Vertical Bracket Box Clamps 54151-FBX (Pack of 50)
No reviews
- Sale price
- $152.75
- Regular price
- $152.75
4 Inch Octagon Box 1-1/2 Inch Deep Adjustable Bar Hanger MC Clamp 54151-HUBX (Pack of 50)
4 Inch Octagon Box 1-1/2 Inch Deep Adjustable Bar Hanger MC Clamp 54151-HUBX (Pack of 50)
No reviews
- Sale price
- $243.10
- Regular price
- $243.10
4 Inch Octagon Box 2-1/8 Inch Deep Flat Vertical Bracket BX Clamps 54171-FBX (Pack of 30)
4 Inch Octagon Box 2-1/8 Inch Deep Flat Vertical Bracket BX Clamps 54171-FBX (Pack of 30)
No reviews
- Sale price
- $151.32
- Regular price
- $151.32
4 Inch Octagon Box 2-1/8 Inch Deep J Flush Mount Wood Spike Bracket BX Clamps 54171-JBX (Pack of 30)
4 Inch Octagon Box 2-1/8 Inch Deep J Flush Mount Wood Spike Bracket BX Clamps 54171-JBX (Pack of 30)
No reviews
- Sale price
- $136.60
- Regular price
- $136.60
Get in Touch
Live Chat
Get replies right away!
Email
info@nassaunationalcable.com
Call Us: 1-516-482-6313 Text Us: 1-516-703-3460
