Leviton Snap-On Cover for 66 Blocks

Clear Plastic Cover to Protect Your M Block

We Guarantee to Have the Best Price

What's special about M block cover?

  • Transparent plastic to quickly identify a row or a short
  • Snaps onto 25 and 50 pair M blocks to protect them from dirt and dust
  • Wires can easily be routed out on the left or right side while the cover is closed
  • Click for More Features

This clear cover for 25 or 50-pair 66 blocks allows you to see inside without opening or removing it. Quickly snaps on and stays in place, but can be snapped off for easy maintenance.


LE-40050-MCV Leviton Snap-on Cover
  • Cover can easily be removed for maintenance
  • Durable, fire-retardant plastic for safety
  • Cover easily snaps off to add wiring
  • Does not have or require a designation strip, as components can be easily inspected


Part # LE-40050-MCV
Fits 66 / M blocks
Height 10"
Width 3-5/16"
Color Clear
Material Fire-retardant plastic



Modular AdaptersModular Adapters
Modular adapters plug into M blocks to convert 66-clip contacts to a modular jack for quick connection of equipment.
Bridging ClipsBridging Clips
Price per pack
Bridging clips press onto the two center slots in any row of a Split M block. If outside cable pairs are terminated on the left-hand clips and station equipment wire is terminated on the right-hand clips, then connections can quickly be made or eliminated by simply inserting or removing the bridging clips.
M Block, 25-PairM Block: 25-Pair
This 66 Connecting Block enables you to quickly interconnect phone lines and communication cable. Simply place the unstripped wire on the 66 Connecting Block clip and press down with a punch down tool. The tool automatically puts wire in place and trims off any excess.
Leviton Split M BlockSplit M Block: 50-Pair
The Split M block contains 50 rows of clips, but instead of one 4-slot clip as the 25 pair M Block, each row contains two separate 2-slot clips.
Leviton M Block with Female & Male ConnectorsM Block with Female & Male Connectors
The 50-pair M block contains prewired, pretested 25-pair female connector on left and male connector on the right for the quickest installation. Easily plug in the connectors and insert bridging clips to complete the connections.
Wire Distribution SpoolWire Distribution Spools
From each
Facilitate routing and fanning of cable, cross-connections, and jumper wires to any connection apparatus. Mount conveniently on backboard of distribution frame.
we will beat a competitor's quote by 5%

Did you know that we can give you a quote for most of our products, including shipping?

You can also call us toll free 866.222.0030

Questions & Answers

Do you have any questions about this product?
Let our experts and customers resolve all your doubts

What can make this page better?

We do everything we can think of to provide you with the product specs, images and ordering info you need, but if we're missing something or still have room to improve, please let us know. Your comments, suggestions and questions are the best tools we have for serving you better!