108120 Hex Plug-Big

108120 Hex Plug-Big

This is a Society of Automotive Engineers (SAE) O-Ring Boss (ORB) plug, featuring an internal hex (Allen) drive for installation and a pre-installed O-ring for a positive, leak-proof seal. It is used to cap off unused hydraulic ports on valve manifolds and other hydraulic components in concrete mixer trucks. This specific plug is associated with the McNeilus 0108120 hydraulic combo block, where it serves to block a fluid path that is not needed for a particular truck configuration, preventing leaks and contamination.

Key Features

• Internal hex socket drive for recessed installation and removal
• Includes a Buna-N (Nitrile) O-ring for a positive seal against hydraulic fluid leaks
• Designed to fit standard SAE O-Ring Boss (ORB) threaded ports
• Zinc-plated steel construction for corrosion resistance in harsh environments

Fits These Mixers

McNeilus, Terex, Con-Tech. This plug is used to seal unused ports on the McNeilus 0108120 MTM Combo Block, a hydraulic manifold used on McNeilus rear discharge concrete mixers.

All measurements ± standard manufacturing tolerance.

Product descriptions are drafted with automated tools and reviewed as time allows. While we work to keep them accurate, specifications and fitment should be confirmed with a Customer Service specialist at 800-745-3414 before purchase. Found an error? Let us know and we’ll fix it.